Artificial Intelligence Essay -- Essays Papers

Artificial Intelligence Research Paper Genesis, creation, the very beginning; from his inception, man has endeavored to control, to name, to create ultimately in his own image as he was created from God. Man forges his own destiny from the coals of his imagination and the raw iron of his will to create. His tools have changed as time has passed, but his desire, his fire to create; to change his world has not. Time and technology can temper mans creativity, but the desire burns as strong today as ever. Art, literature, and technology; be it paint, paper or steel mans creativity is manifest in everything we do. The crowning jewel for man will be to pass on that spark with which he has been entrusted, robotics, genetic engineering, and their ilk have been trying to create new life from the raw tools with which man is so proficient. It can be said that as Prometheus took fire from the heavens to give to man, so shall man give fire of another kind, and be it biological or made from the cold steel and silicon gateways through which we now travel man will at last, have his legacy. There is a caveat however, with knowledge comes change, with creation comes difference, and with difference comes fear, hatred and discrimination. People have forever shunned that which they do not understand, that which is different from the face they see in the mirror in the morning. Since initial forays into the AI field in 1950 there have been philosophical as well as technical concerns. As technology advanced and the concept of a machine that â€Å"thinks† became more and more plausible the philosophy became more apparent. The basic problem we are confronted with is: Can machines think? In his book entitled Philosophical perspectives in artificial intelligence, Martin Ringle calls for â€Å" a logical and semantic analysis of the concepts of ‘thought’, ‘intelligence’, ‘consciousness’, and ‘machine’, rather than an empirical assessment of computer behaviour† (hjhjh,999,2000). Thusly from its birthing AI has been regarded as an unknown, a concept that by its very name challenges nearly every norm and convention we have as individuals and as a society. Thusly because of its inherent alien nature artificial life will be subject to the same prejudices as race, gender and religion, once it is integrated into society and assumes roles associated with humans. As we vent... ...eality—a paradigm in which both human and computer share a real physical space within which to make hand gestures, facial displays, body movements, and real physical objects that can be passed back and forth between the real and virtual world† Scholars have long been trying to quantify the actual differences between â€Å"brain† and â€Å"mind† as well as the degree to which psychology can be converted into a physical science. Society as an entity seems unwilling to make leaps of judgment or significant paradigm shifts dealing with such concepts. The realms of the physical and the more nebulous sciences of the mind must for the time being remain separate. Once we begin to mesh technology more closely with ourselves as humans we can begin to accept it as a part of ourselves and as a part of our society. While today we do not possess the technology to achieve a truly sentient machine we cannot because of that speculate too deeply as to the results of such an achievement. The image of a cold â€Å"Terminator† style robot or perhaps HAL from 2001 is perhaps the exact opposite of the eventual reality. We cannot form opinions without the proper grounding in science, philosophy and indeed, ourselves.

Sociology Principles of College :: Sociology Essays

Sociology in Familiar Places: Expectations Norms are found in all societies. Colleges are subcultures. There is a specific way of doing things and all campuses are different. Everyone has expectations on how college life will be and the standards that come with it. â€Å"More than a wish or a hope, an expectation is something a student believes will happen, anticipates doing or experiencing. Expectations are grounded in a student's self-understanding and in knowledge about the college or university at which he or she plans to spend the next four years or more.† This superior justification of what a college student foresees by Robert Gonyea, really depicts what a scholar looks forward to in his or her college years. When expectations are applied to the student it is treated as a plan or a goal. However, when intended for the institution, it is looked upon as an obligation. There are so many ideas one thinks of when starting a new chapter in life. Some occasional deliberations include parties, freedom, higher workload, dating, and leaving the comfort zone of high school. In reality, many of these things don’t change, while others alter significantly. A typical expectation of the college life is more freedom in choice. Classes are taken upon his or her own schedule. Everyone, besides getting the general education out of the way, has a decision of what classes to take. Classes begin focusing on the career being pursued, rather than faculty and school regulations. The possibilities are endless in college. This is what created the saying, â€Å"You can be anything you want to be.† This has been said a million times and will be heard a million more. With this newfound freedom of choice comes responsibility. â€Å"Ditching class† has now become something of the past. Unlike high school, classes cost money. Paying for education makes it to where the people who actually want to be there will be, rather than idlers that are there only by force. No one cares if you skip class. Everything, including the grade, is up to the student. Although half the time, professors rarely even take role, missing one class can result in not understanding the newt two weeks worth of work or more. Choose to go to class or not, but if not, the student is paying to fail a class. Goals should be set to avoid skipping of classes. "To maximize learning and involvement during the first year of college, students need to set personal goals that are high enough so that they must try their best in classes and use campus resources to augment what they are learning in their classes.

Physics Preliminary Course Overview

Physics Preliminary 8. 2 The World Communicates 1. The wave model can be used to explain how current technologies transfer information 1. Describe the energy transformations required in one of the following: – Mobile telephone – Fax/modem – Radio and television A. An energy transformation is a change in the type of energy, for example a change from sound energy to electromagnetic waves.Relating this to the mobile telephone, it undergoes basic energy transformations of, sound wave (your voice), to electrical energy (in the wires inside the phone), to electromagnetic waves (from the phone to the tower), to electrical energy (at the tower), then to electromagnetic waves (to reach the receiving phone), then electrical energy (inside the receiving phone), then to sound waves (at the speaker of the receiving phone) 2. Describe waves as a transfer of energy disturbance that may occur in one, two or three dimensions, depending on the nature of the wave and the medium A.W aves carry energy and sometimes they require a medium and sometimes they don’t. Laser lights are an example of a 1 Dimensional wave, water waves are an example of a 2D wave while an example of 3D waves is a sound wave 3. Identify that mechanical waves require a medium for propagation while electromagnetic waves do not A. Mechanical waves, such as sound waves, water waves and earthquake waves need a medium (a substance) to travel through, they cannot move from one point to another if there is nothing (a vacuum) between the two points.On the other hand electromagnetic waves do not need a medium to travel through. An example of this is in space, which is a vacuum, if you call out in space your sound waves do not penetrate out of your space suit. However electromagnetic waves do, therefore you can see the light from the sun. Even simpler, in space you can see a planet explode, but you cannot hear it. 4. Define and apply the following terms to the wave model: medium, displacement, amplitude, period, compression, rarefaction, crest, trough, transverse waves, longitudinal waves, frequency, wavelength, and velocity A.Mechanical Waves: The group of waves that required a medium for transmission, e. g. sound waves Electromagnetic Waves: The group of waves that do not require a medium for transmission i. e. ultraviolet light, visible light etc. They all travel at the same speed in a vacuum, which is the speed of light. Transverse Waves: Waves in which the particles oscillate at right angles to the direction of motion of the wave, e. g. surface water waves. Direction of Propagation: The direction of motion of a waveLongitudinal Waves: Waves in which the particles oscillate parallel to the direction of motion of the wave e. g. sound. Periodic Waves: Wave disturbance that repeat themselves at regular intervals. Compressions: Regions of a longitudinal wave where the particle are close together. The point where the medium has a maximum density Rarefactions: Regions of a longitudinal wave where the particles are spread apart. The point where the medium has a minimum density. Crest: The point of a wave where the particles of the medium have a maximum displacement upwards or in a positive direction.Trough: The point of a wave where the particles of the medium have a maximum displacement downwards or in a negative direction Amplitude: The maximum displacement of the particles of a medium from their rest position Wavefront: An imaginary line joining any group of adjacent particles that are in a phase with each other. Wavelength: The distance between any two corresponding points of a wave Frequency: the number of waves that pass a point in one second Period: Number of crest passages per unit time. 5. Describe the relationship between particle motion and the direction of energy propagation in transverse and longitudinal waves A.Particles in the medium move in a direction perpendicular to the motion of transverse wave. Particles in the medium move in a di rection of parallel to the motion of longitudinal waves 6. Quantify the relationship between velocity, frequency and wavelength for a wave: A. V=fw (v=velocity, f= frequency, w=wavelength) 2. Features of a wave model can be used to account for the properties of sound 1. Identify that sound waves are vibrations or oscillations of particles in a medium A. Sound is a longitudinal wave that requires a medium to travel through.As compressions and expansions (or rarefactions) of particles that make up the medium, sound is a vibration of the medium. 2. Relate compressions and rarefactions of sound waves to the crests and troughs of transverse waves used to represent them A. Compressions: Regions of a longitudinal wave where the particle are close together. The point where the medium has a maximum density Rarefactions: Regions of a longitudinal wave where the particles are spread apart. The point where the medium has a minimum density. Crest: The point of a wave where the particles of the m edium have a maximum displacement upwards or in a positive direction.Trough: The point of a wave where the particles of the medium have a maximum displacement downwards or in a negative direction 3. Explain qualitatively that pitch is related to frequency and volume to amplitude of sound waves A. Frequency is the number of waves that pass a point in one second while the pitch is related to the number of vibrations per second. The pitch of a sound relates to the frequency of the sound emitted while the amplitude relates to the volume of that sound. E. g. if you have a high amplitude you will have a loud sound.When the frequency increases so does the pitch. 4. Explain an echo as a reflection of a sound wave A. An echo occurs when a sound wave is reflected off a surface and returns to the source. 5. Describe the principle of superposition and compare the resulting waves to the original waves in sound A. When two separate waves meet they can be added to or subtracted to make a new wave. An example of this with sound waves is, if you have one person shout, and then you get two people to shout, each at the same volume as the first person, the resulting volume will be the sum of the two volumes. . Recent technological developments have allowed greater use of the electromagnetic spectrum 1. Describe electromagnetic waves in terms of their speed in space and their lack of requirement of a medium for propagation A. Electromagnetic waves do not need a medium to travel through because electromagnetic waves do not vibrate particles so they don’t need a vaccum. In space (a vacuum) electromagnetic waves travel at the speed of light, a constant equal to 2. Identify the electromagnetic wavebands filtered out by the atmosphere, especially UV, X-rays and gamma rays A.The Earth’s atmosphere provides a protective shield from harmful electromagnetic radiation. Fortunately this portion of the EM spectrum (UV rays, X-rays and Gamma rays) is filtered by the Earth’ s atmosphere. Earth’s atmosphere filters out most of the electromagnetic waves except for visible light and radio waves. 3. Identify methods for the detection of various wavebands in the electromagnetic spectrum A. – Radio waves are detected with radio receivers that are connected to aerials. – Microwaves are detected with piezoelectric crystals. – Visible light is detected by photoelectric cells. 4.Explain that the relationship between the intensity of electromagnetic radiation and distance from a source is an example of the inverse square law: A. The strength of a signal is proportional to the square of the distance from the source of that signal. This means that at twice the distance the signal has 1? 4 of its original strength. 5. Outline how the modulation of amplitude or frequency of visible light, microwaves and/or radio waves can be used to transmit information A. Modulation is the process of conveying a message signal inside another signal that c an be physically transmitted.With amplitude modulation (AM), the amplitude or strength of the carrier signal is varied, which corresponds to changes in the sound, while its frequency remains constant. With frequency modulation (FM), the frequency of the carrier wave is altered according to changes in sound while the amplitude remains constant. 6. Discuss problems produced by the limited range of the electromagnetic spectrum available for communication purposes A. There is only a limited range of wavelengths in the electromagnetic spectrum that can be used for communication purposes. 4.Many communication technologies use applications of reflection and refraction of electromagnetic waves 1. Describe and apply the law of reflection and explain the effect of reflection from a plane surface on waves A. Reflection is the bouncing of a wave when it hits a surface or obstacle. Reflections of all types of waves follow the law of reflection. Angle of Incidence = Angle of Reflection The law of reflection states that the angle of the incident wave must equal the angle of the reflected wave and the incident wave and the reflected wave must lie in the same plane.It is important to remember that the angle of incidence and the angle of reflection is measured from the normal. The normal is perpendicular to the plane of reflection (e. g. a mirror). 2. Describe ways in which applications of reflection of light, radio waves and microwaves have assisted in information transfer A. Reflection of light is used fibre optics and in CD’s. Fibre optics allow for massive amounts of information transfer. Reflection of radio waves are utilised when radio waves are reflected off the ionosphere. Television and radio use this reflection to transfer information. . Describe one application of reflection for each of the following: – Plane surfaces – Concave surfaces – Convex surfaces – Radio waves being reflected by the ionosphere A. Reflection on a plane surfac e is used in applications such as, CD-ROM, where the laser beam is either reflected of the CD or not. Reflection of convex surfaces is used in security mirrors, where it widens the field of view. Reflection of concave surfaces is used in torches, where the rays of light travelling backwards are projected forward, for more brightness. It is also used in satellite dishes.The ionosphere reflects a percentage of radio waves sent up, back towards earth. This allows for data to be sent through the radio waves over long distances. 4. Explain that refraction is related to the velocities of a wave in different media and outline how this may result in the bending of a wavefront A. Refraction is the bending of light as it changes speed upon entering a medium with different optical density. 5. Define refractive index in terms of changes in the velocity of a wave in passing from one medium to another A. The refractive index of a medium is the change in velocity of a wave from one medium to anoth er.Therefore refractive index is related to the speed of a wave in that medium 6. Define Snell’s Law: A. 7. Identify the conditions necessary for total internal reflection with reference to the critical angle A. The critical angle is the angle of incidence, which forms an angle of refraction at 90Â °. If the angle of incidence is less than the critical angle then you will have normal refraction, and if the angle of incidence is greater than the critical angle then you will have total internal reflection. 8. Outline how total internal reflection is used in optical fibres A.Optical fibres work by having one medium coated by another medium with a lower refractive index. The angle that enters this is greater than the critical angle so therefore the ray of light bounces around inside and travels from one end to another, never exiting the fibre. Therefore a light ray can travel through the wire. The ray of light never has an angle of incidence of less than the critical angle, so t he ray never escapes the optical fibre. 5. Electromagnetic waves have potential for future communication technologies and data storage technologies 1.Identify types of communication data that are stored or transmitted in digital form A. Digital data is data that can be defined by numbers. Examples of digital communication include; fax, Internet, telephone calls, etc 8. 3 Electrical Energy in the Home 1. Society has become increasingly domestic energy dependent on electricity over the last 200 year 1. Discuss how the main sources of domestic energy have changed over time A. The first main source of domestic energy used by humans was fire, through wood, and then came domesticated animals, wind and water, coal, coal gas, electricity, fuel oils, solar and lastly nuclear energy.These have developed from the start of human existence to now. 2. Assess some of the impacts of changes in, and increased access to, sources of energy for a community -More pollution -More demand for electrical en ergy -More electrical devices -Increased demand for energy 3. Discuss some of the ways in which electricity can be provided in remote locations Alternative power sources can be used, such as solar or wind. 2. One of the main advantages of electricity is that is can be moved with comparative ease from one place to another through electric circuits . Describe the behaviour of electrostatic charges and the properties of the fields associated with them A. An object becomes electrostatically charged when there is either a deficiency or excess of electrons. The two types of charge are called positive charge and negative charge. Electrostatic charges cause charged particles to move of change direction. Electrostatic charges create a field of charge. An electric field is a region in which a charged particle will experience a force. 2. Define the unit of electric charge as the coulomb. A.The SI unit of charge is the coulomb (C). A charge of 1 C is equal to the charge provided by 6. 25 x 10 ( to the power of 18) electrons. This gives a charge of -1. 6 x 10 (-19 power) C for one electron. One coulomb is defined as the amount of charge that passes a point when a current of one ampere flows for one second. 3. Define the electric field as a field of force with a field strength equal to the force per unit charge at that point 4. Define electric current as the rate at which charge flows (coulombs/ second or amperes) under the influence of an electric field A.Electric current is defined as the amount of electric charge flowing past a given point in a given time interval. The SI unit of electric current is coulombs per second (C. s-1) or ampere (A), 1 amp is equal to 1 coulomb of charge passing a given point in 1 second. Conventional current runs from + to -. The electron movement is in the opposite direction of conventional current. 5. identify that current can be either direct with the net flow of charge carriers moving in one direction or alternating with the charge carriers moving backwards and forwards periodically A. AC current involves the oscillation of electrons due to an electric field that is constantly changing direction. Most generators produce alternating current by means of a coil rotating in a magnetic field. – With DC current flow, the electrons in a wire have an overall flow in only one direction. This is the method used in batteries, torches, portable radios, lights in cars, and toys. 6. Describe electric potential difference (voltage) between two points as the change in potential energy per unit charge moving from one point to the other (joules/coulomb or volts). A. 7.Discuss how potential difference changes at different points around a DC circuit A. Voltage or potential difference is defined as the change in energy when one unit of charge is moved from one point to another or the work done to move one unit of charge from one point to another. Decreases as it move around the circuit. 8. Identify the difference between conductors and insulators A. -A conductor is a substance in which there are ‘free’ charged particles and so a charge is able to flow through it. -An insulator is a substance in which ‘free’ charged particles are limited and so a charge is not able to flow through it. . Define resistance as the ratio of voltage to current for a particular conductor: 10. Describe qualitatively how each of the following affects the movement of electricity through a conductor: A. – Length: The longer the material the higher the resistance is. – Cross sectional area: The larger the cross sectional area the lower the resistance is. So the thicker the wire then lower the resistance. – Temperature: The higher the temperature of a material, the higher the resistance is. – Material: Different materials have different resistances. This is called the resistivity of that material. . Series and parallel circuits serve different purposes in households 1. Identify the diff erence between series and parallel circuits A. – A Parallel circuit is a closed circuit in which the current divides into two or more paths before recombining to complete the circuit. – A series is a circuit having its parts connected serially Advantages of using parallel circuitry over series circuitry in household wiring include: – You can have some devices on and others off at the same time. – If one device fails the others still work. – All devices receive the highest possible voltage. 2.Compare parallel and series circuits in terms of voltage across components and current through them A. In a parallel circuit the voltage is the same throughout the whole circuit while the current is divided between evenly throughout the circuit. In a series circuit the current is the same throughout the circuit while the voltage is divided evenly through the components of the circuit. 3. Identify uses of ammeters and voltmeters A. Ammeters are used to measure c urrent. Voltmeters are used to measure voltage. To measure the voltage of a component the voltmeter is placed in parallel with the component.To measure the current passing through a component, the ammeter is placed in series with the component. When an ammeters work best if they have a low resistance. And voltmeters work best if they have a high resistance. 4. Explain why ammeters and voltmeters are connected differently in a circuit A. Voltage is sometimes called potential difference. So it is measuring the difference between two points, so is must be placed in parallel so that it can measure the difference between before and after that component. Current is a measure of the rate at which charge flows, and therefore must be connected in series.Ammeters have a low resistance. 5. Explain why there are different circuits for lighting, heating and other appliances in a house A. Because if they were all on the same circuit there would not be enough power to run all the appliances so the y are spread out on several circuits so there is enough power. 4. The amount of power is related to the rate at which energy is transformed 1. Explain that power is the rate at which energy is transformed from one form to another A. Power is the term used to describe how quickly energy (otherwise known as work) is transformed from one form to another, or transmitted from one point to another. . Identify the relationship between power, potential difference and current A. 3. Identify that the total amount of energy used depends on the length of time the current is flowing and can be calculated using: Energy = VIt A. – Energy = Voltage ? Current ? Time – Energy = Power ? Time – Energy is measured in joules (J). 4. Explain why the kilowatt-hour is used to measure electrical energy consumption rather than the joule A. 1 kWh is 1 kW every hour. The kWh is used to measure energy consumption. 5. Electric currents also produce magnetic fields and these fields are used in different devices in the home . Describe the behaviour of the magnetic poles of bar magnets when they are brought close together A. Magnetic fields are from north to south. When two bar magnets are brought close together the magnetic fields around their poles will produce a force between the two magnets. If two like poles (north pole and north pole OR south pole and south pole) are brought close together they will repel each other while if two unlike poles (a north pole and a south pole) are brought close together they will attract each other. Like poles repel: Unlike poles attract. 2.Define the direction of the magnetic field at a point as the direction of force on a very small north magnetic pole when placed at that point A. The direction of a magnetic field at any point is defined as the direction the north pole of a compass would indicate at that point. 3. Describe the magnetic field around pairs of magnetic poles A. The magnetic field around pairs of magnetic poles is best des cribed by describing the lines of magnetic flux. Lines of flux are directed from the north pole to the south pole and never cross. In a strong magnetic field they are close together while in a weak magnetic field they are well apart. . Describe the production of a magnetic field by an electric current in a straight current carrying conductor and describe how the right hand grip rule can determine the direction of current and field lines A. When current is passed through a conductor, a magnetic field is created around it. The direction of the magnetic field can be found using the right hand rule. Point your right hand thumb in the direction of the current and the direction of your fingers is the direction of the magnetic field. 5. Compare the nature and generation of magnetic fields by solenoids and a bar magnet A. A solenoid is coil of wire.When a current is passed though a solenoid, a magnetic field similar to that of a bar magnet is produced. 6. Safety devices are important in hou sehold circuit 1. Discuss the dangers of an electric shock from both a 240volt AC mains supply and various DC voltages, from appliances, on the muscles of the body A. There are several dangers when the muscles of the body are exposed to electric shocks. These are: – Pain receptors are usually activated. – Involuntary contraction of the muscles usually means that the person will not be able to let go of the power source. – The heart is stunned and goes into fibrillation. Severe burns are inevitable. – Instant death often occurs. 2. Describe the functions of circuit breakers, fuses, earthing, double insulation and other safety devices in the home A. – Double Insulating works by wrapping or encasing the electric components of an appliance with insulating material The insulating property of these materials sets up a physical barrier to prevent the flow of electricity from the electric appliance to its user. – A fuse is a short piece of an alloy of lead and tin, connected in series with the devices that it controls. The fuse is designed to melt when the current passing through it exceeds its threshold value. Circuit Breakers breaks the circuit when the current passing through it exceeds the threshold value by mechanical means – The active and neutral wires are connected to the functional electric unit of the appliance to deliver electricity. The earth wire is attached to the case of the appliance, which is made of metal. 8. 4 Moving About 1. Vehicles do not typically travel at a constant speed 1. Identify that a typical journey involves speed change A. Motion occurs when an object changes its position relative to other objects or within some coordinate system.A frame of reference is an object or a coordinate system that can be used to describe or compare motions. At the start of a journey your speed is 0 by the end of the journey you would have had to stop at traffic lights go up and down hills and e. g. 2. Distingui sh between the instantaneous and average speed of vehicles and other bodies A. Average Speed Is your total distance taken by the time it took you to go that distance. Instantaneous Speed is the speed that you are travelling at any given instant 3. Distinguish between scalar and vector quantities in equations A. Scalar uantites have a magnitude but no direction examples include distance, speed and time. Vector quantities have a magnitude and a direction. Examples include velocity, force and displacement 4. Compare instantaneous and average speed with instantaneous and average velocity A. Instantaneous speed is a scalar quantity, on the other hand instantaneous velocity is a vector quantity. Average speed is also a scalar quantity and average velocity is a vector quantity. Average speed takes into account your whole journey, where as average velocity only takes into account the starting and ending points. 5. Define average velocity as:A. 2. An analysis of the external forces on vehicl es helps to understand the effects of acceleration and deceleration 1. Describe the motion of one body relative to another A. Motion occurs when an object changes its position relative to other objects or within some coordinate system. e. g. You are watching Coyote chase Road Runner. Road Runner’s velocity is 17 m. s east and Coyote’s velocity is 15 m. s east. Road Runner’s velocity RELATIVE to you is 17 m. s east. Road Runner’s velocity RELATIVE to Coyote is 2 m. s east. 2. Identify the usefulness of using vector diagrams to assist solving problems A.Vector diagrams are used to add vectors, to find the resultant vector. This can be used to find the net force on an object from many smaller forces. Addition of vectors is also used to find total displacement 3. Explain the need for a net external force to act in order to change the velocity of an object A. An object remains at rest, or in uniform motion in a straight line unless acted on by an external forc e. This is also known as the law of inertia. It basically means that a moving object will travel in a straight line at a constant velocity until an external unbalanced force acts pon the object. 4. Describe the actions that must be taken for a vehicle to change direction, speed up and slow down A. As stated by Newton’s 1st law of motion, in order to change a vehicles direction or speed, you need an external force, to act on the vehicle. However on earth there is, gravity, air resistance and friction to slow a car down, and trust from the engine and friction with the ground and the tyres to speed up a car. 5. Describe the typical effects of external forces on bodies including: – Friction between surfaces – Air resistance A.Friction examples are constantly seen throughout a normal day and it normally slows you down or helps change direction 6. Define average acceleration as A. 7. Define the terms ‘mass’ and ‘weight’ with reference to the effects of gravity A. Mass is the amount of matter in a body whereas weight is the force due to gravity acting on that mass. Weight is equal to mass times force due to gravity, which on earth is 9. 8 m. s. This is an extension of newton’s 2nd law of motion. F=ma 8. Outline the forces involved in causing a change in the velocity of a vehicle when: – Coasting with no pressure on the accelerator Pressing on the accelerator – Pressing on the brakes – Passing over an icy patch on the road – Climbing and descending hills – Following a curve in the road A. 9. Interpret Newton’s Second Law of Motion and relate it to the equation: A. The net force of an object is equal to the product of its mass and its acceleration in the direction of the force. 10. Identify the net force in a wide variety of situations involving modes of transport and explain the consequences of the application of that net force in terms of Newton’s Second Law of Moti on A. Net force is defined as the vector sum of all forces.The net force is the resultant force of all individual forces acting on an object at that time. If the net force is zero, then the forces acting are described as balanced. The object will obey Newton’s first law of motion, that is, it will either continue to move at a constant velocity or remain stationary. If the net force is not a zero value, it is described as an unbalanced force. In this case, the object follows Newton’s second law of motion and acceleration will result. 3. Moving vehicles have kinetic energy and energy transformations are an important aspect in understanding motion . Identify that a moving object possesses kinetic energy and that work done on that object can increase that energy 2. Describe the energy transformations that occur in collisions Elastic potential energy is the energy stored in elastic materials as the result of their stretching or compressing. In an elastic collision, the EK a fter the collision is equal to the kinetic energy before the collision. Inelastic collisions result in the transformation of energy into other forms. It is usually lost to the surroundings in the form of heat or sound and is no longer in a useful form. . Define the law of conservation of energy Energy can neither be created nor destroyed but can be transferred from one body to another or transformed from one type to another. 4. Change of momentum relates to the forces acting on the vehicle or the driver 1. Define momentum as: Momentum is a measure of an object's tendency to move in a straight line with constant speed. Momentum is the product of mass and velocity p ? mv 2. Define impulse as the product of force and time Impulse is force applied over a period of time Impulse = Force (Times) Time 3.Explain why momentum is conserved in collisions in terms of Newton’s Third Law of motion In any collision, the total momentum before the collision is equal to the total momentum after the collision 5. Safety devices are utilised to reduce the effects of changing momentum 1. Define the inertia of a vehicle as its tendency to remain in uniform motion or at rest The inertia of a vehicle is its tendency to remain at rest or in uniform motion unless acted on by an external force. That is why when you crash a vehicle into a wall, it will continue to collide and squash into the wall instead of just stopping.This is also why a passenger in a vehicle continues to go forward when the breaks of a vehicle are applied. Because the car may have forces slowing it down but the passenger has a tendency to continue forward 2. Discuss reasons why Newton’s First Law of Motion is not apparent in many real world situations There is always some type of friction that will oppose motion. Whether it is air resistance or friction between the object and the surface it travels on, it is impossible to completely eliminate friction. This is why objects do not remain in uniform motion. 3.Assess the reasons for the introduction of low speed zones in built-up areas and the addition of air bags and crumple zones to vehicles with respect to the concepts of impulse and momentum Air Bags and Crumple Zones both increase the stopping distance of a vehicle. Relating back to Impulse = Force ? Distance, If the distance is increased, the force is lower, this reduces the forces put on an the vehicle, and the occupants inside it. Low Speed zones are in place because, the slower your velocity, the less momentum you have and the faster you can stop 4. Evaluate the effectiveness of some safety features of motor vehicles 8. 5 The Cosmic Engine

Match made in heaven Essay

â€Å"There is nothing nobler or more admirable than when two people who see eye to eye keep house as man and wife, confounding their enemies and delighting their friends. † Homer That bard created such two people in The Odyssey, their contrasting roles concealing the similarities in their natures. Both Penelope and Odysseus dealt with â€Å"a world of pain†, but in very different settings: she wastes away at home, while he faces a myriad of adventures and sufferings around the Greek world. Although Homer assigned them dissimilar parts in his epic, however, his story still reveals striking resemblances between Odysseus and Penelope: they possess positive qualities and several faults in common as well as one major dissimilarity, all of which are the secrets to their long and blissful marriage and help them to see â€Å"eye to eye. † One can easily see why Ithaca’s king and queen remained happily united for so many years when looking at the shining characteristics they share. Both are wondrously loyal, even when faced with an abundance of temptations. Over the course of twenty years, Odysseus knew countless lovely women, from Nausicaa to Calypso, yet he remained determined to return to his wife. Likewise, Penelope had her choice of one-hundred and eighty of the best men in Greece all vying for her hand, but she still â€Å"falls to weeping for Odysseus† every time she thinks of her beloved husband. Undoubtedly, The Odyssey’s happy ending could not have occurred without their mutual fidelity. Cunning brilliance is the second attribute common to both Odysseus and Penelope, and it served to reunite them as much as their reciprocal devotion did. Odysseus is known as the â€Å"man of twists and turns†, and presumably, he used his acumen to select a wife who could match him in matters of the mind. Being the hero of the story, Odysseus’s brains are flaunted by Homer in his every action, from his escape from the Cyclops to all the creative stories he fabricated. But Penelope’s wisdom can also be detected within the text, and is crucial to the plot. For example, take the often-retold story of her web, woven and unwoven to keep the suitors at bay for three years, or when in Book 18, she coyly elicited expensive gifts from each suitor to compensate for some of her husband’s squandered estate. One can also adduce the test she devised for the suitors as a confirmation of her sagacity: â€Å"The hand that can string this bow with the greatest ease†¦ he is the man I follow. † Penelope knows very well that it is highly unlikely that one of her brazen suitors could muster the strength needed to shoot â€Å"his polished bow†: it was just another clever way postpone marriage. Had Penelope not â€Å"sp[un] out her wiles†, much like her husband had done abroad, the lovely queen of Ithaca would probably have been coerced into an unwanted union long before Odysseus returned. Not only are the queen and king of Ithaca alike for possessing dominant traits of loyalty and astuteness, they also share several shortcomings. Firstly, although they are devoted enough to pine for each other for two decades, neither were one hundred percent loyal to their spouse. Odysseus did not remain faithful to Penelope, sleeping with Circe, then Calypso, and perhaps some mortal women unworthy of being mentioned as well. Odysseus claims that he lay with the Circe for the sake of diplomacy, but if so, then why did he stay in her â€Å"arching caverns† for over a year, leaving only at his crew’s urging? Homer also hints at Odysseus’s voluntary treachery during his seven-year detainment with Calypso, including lines such as â€Å"they lost themselves in love†, and â€Å"since the nymph no longer pleased. † Is the bard implying that the nymph with lovely braids once pleased him, and thus, he willingly copulated with her? Penelope, being a woman, could not have had such affaires d’amour and still be considered loyal. However, because she was only a woman, she still harbored an innate desire to attract men. In Book 18, she fulfilled Athena’s wish that she should â€Å"display herself to her suitors, fan their hearts, inflame them more† in order to receive the suitors’ gifts, but perchance also to satisfy her own longing for attention – after all, Penelope is a woman whose husband has been gone for more than twenty years. She succeeds in accomplishing both: After she descends the stairs, â€Å"the suitor’s knees went slack, their hearts dissolved with lust† and they showered her with â€Å"gorgeous presents. † Homer seems to reiterate this fact that Penelope enjoyed the courtship of so many fine, young princes, even though her suitors were a burden and a plague to the household. Book 19 includes a passage describing a dream Penelope had, in which an eagle, which later reveals himself as Odysseus, destroys her flock of geese by â€Å"snap[ping] their necks and kill[ing] them one and all†, the geese obviously symbolizing her gaggle of suitors. Penelope is comforted by this dream and seems to hope that it foreshadows future events, but also acknowledged that she â€Å"wept and wailed† and was â€Å"sobbing, stricken† at the slaying of her geese. Hence, though Penelope does remain honorable and is faithful to Odysseus during the twenty years when they were apart, she still, perhaps subconsciously, fostered a desire to do otherwise. However, Penelope’s slight interest in her suitors may not be a have been such a bad thing; on the contrary, it could have inspired her to forgive her husband more easily if he ever told her of his dalliances with goddesses. Second, both Odysseus and Penelope are characterized as â€Å"wary†, and although their caution helped them to succeed in many situations, both are overly circumspect at times, causing them to be suspicious of those who love them most. One of the most tense and heartbreaking scenes in the book takes place in Book 23, when Penelope is face to face with her devout husband for the first time after twenty years of separation, yet refuses to acknowledge him, prompting Telemachus to reproach: â€Å"What other wife could have a spirit so unbending? Holding back from her husband, home at last for her After bearing twenty years of brutal struggle- Your heart was always harder than a rock! † Her son is right, but Penelope still refused to speak to Odysseus, even after Telemachus’s rebuking, causing the great-hearted Odysseus to â€Å"blaze up in fury† over his wife’s distrust. An analogous incident took place later between Odysseus and his old father. Seeing Laertes in the orchard, Odysseus observed him sitting alone, â€Å"his heart racked with sorrow†, a sight enough to make even â€Å"long-enduring Odysseus† stop to weep. Yet, even so, Odysseus decided to test the old man first, to â€Å"reproach him with words that cut him to the core. † It was wholly unnecessary to verify the loyalty of Laretes, for after all, the man is his father and if that were not enough, Odysseus had heard testimonies to Laretes’s grief from Eumaeus as well as his own mother in Hades. Odysseus’s often-praised caution prompted him to be rather irrational his handling of the situation, telling a tale that causes his dear father to grieve even more: â€Å"Both hands clawing the ground for dirt and grime, he poured it over his grizzled head, sobbing, in spasms. † His suspicion inflicts unnecessary pain on his father, much as Penelope’s caution angered him; nevertheless, it is because their minds operate in such a similar fashion that they are able to understand each other’s rash actions, caused by that extreme â€Å"wariness† which dominates their reasoning. It was because of their faults that Odysseus and Penelope could see â€Å"eye to eye. † But for all their innate likenesses, one main difference remains between the hero and heroine of The Odyssey: Odysseus has pride, a kind of virile self-regard that Penelope surely lacks, for better or for worse. Odysseus’s excessive self-respect gets him into many difficult circumstances: his odyssey of misery would not have occurred had he not revealed his identity to the Cyclops because he could not bear being remembered as â€Å"Nobody†. One cannot imagine that Penelope would find ever herself into such a predicament. However, there are some instances during the plot of The Odyssey when Penelope should have displayed more dignity. Several times throughout the story, Telemachus scolds her in a disrespectful manner, telling her to â€Å"Tend to your [Penelope’s] own tasks†, declaring that he â€Å"hold[s] the reins of power in this house. † Penelope didn’t put her teenage son in his proper place, opting instead to meekly withdraw to her own quarters. Had Telemachus spoken similar words to his father, Odysseus’s ego certainly wouldn’t have allowed such a lack of reverence, and Telemachus most likely would have received some tough love at his hands. Pride is the only significant distinction between the characters of Odysseus and Penelope, but it is a meaningful difference as well. If Ithaca’s queen was as self-righteous as its king, one could expect many royal family squabbles instead of the marital bliss they are famed for. Penelope is modest and demure, attributes that are absolutely necessary in order to live in harmony with a proud man like Odysseus. In conclusion, Odysseus and Penelope are alike in almost every respect, with their good qualities holding them together, their faults leading to understanding, and their one dissimilarity producing compatibility. That is why they were able to build the strongest kind of love, the love described in I Corinthians 13:7 : † Love never gives up, never loses faith, is always hopeful, and endures through every circumstance. † The Odyssey itself is a testimony to this kind of bond between husband and wife, a bond forged by harmonious natures, able to survive through twenty years of separation, temptation, and suffering.

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Discussion of Outsourcing and Its Pro and Cons Assignment

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