Physical Science ISCI 2002
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This 4 page Class Notes was uploaded by Desiree Okuneva on Tuesday October 27, 2015. The Class Notes belongs to ISCI 2002 at University of West Georgia taught by Ann Robinson in Fall. Since its upload, it has received 14 views. For similar materials see /class/230218/isci-2002-university-of-west-georgia in Integrated Pest Management at University of West Georgia.
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Date Created: 10/27/15
ISCI Exam Review N E 4 V39 0 gt1 9 0 O N LA 4 UI ON Chapters 18 Acceleration is de ned as the change in speed divided by time An object travels 8 meters in the first second 8 meters in the second and 8 meters in the third second The acceleration is 0 In the absence of air resistance objects fall at constant acceleration Consider drops of water leaking from a water faucet As the drops fall they become further apart distance increases A ball is thrown straight up At the top of its path its acceleration is 10 III Ali The astronomer Copernicus was the first person to state that the earth revovled around the sun The law of inertia applies to moving and nonmoving objects One object has twice as much mass as the other The first object also has twice as much inertia The force required to maintain an object at a constant speed in space is equal to Q When a woman stands with two feet on a scale the scale reads 500 N When she lifts one foot the scale reads 500 N Which has more mass a kilogram of feathers or a kilogram of iron They have the same mass Accelerations are produced by forces An object has a constant mass A constant force on the object produces constant acceleration A 10 Newton falling object encounters 4 Newtons of air resistance The magnitude of the net force acting on the object is 6 N Forces always occur in pairs An archer shoots an arrow Consider the action force to be the bowstring against the arrow The reaction to the force is the the arrow on the bow string l7 00 0 LA 0 LA LA N LA L U 4 LA UI The reason padded dashboards are used in cars is that they The unit of power is the Potential energy is the energy an object has because of its An unfortunate bug splatters against the windshield of a moving car Compared to the force of the car on the bug the force of the bug on the car is same Your friend says that the heavyweight champion of the world cannot exert a force of 50 N on a piece oftissue paper with his best punch The tissue paper is held in midair no wall or tricks Is your friend right or wrong Right The momentum of an object is defined as the object s mass times speed Which has more momentum a large truck moving at 30 mph or a small truck moving at 30 mph Large Truck The momentum change of an object is equal to the impulse increase the time of impact Which of the following has the largest momentum Largest speedmass In physics work is defined as force moved through a distance The unit of work is the j oule Power is defined as the time it takes to do work watt location An object that has kinetic energy must be moving A job is done slowly and an identical job is done quickly Both jobs require the same amount of work but different amounts of power An object at rest may have energy Which temperature scale labels the freezing point of water at 0 degrees Celsius The energy content of a piece of food is normally determined by burning The reason an ocean s temperature doesn t vary much from one season to the next is that water has a high specific heat Which at the same temperature will cool slower on a hot day Anything with a high speci c heat L O L 7 LA 00 LA 0 A o A A N A U A 00 A 0 VI 0 UI UI N u A Styrofoam plastic is a good heat Heat travels from the sun to the earth by The source of all wave motion is Compared to the speed of light sound travels Electromagnetic waves are insulator During a very cold winter water pipes sometimes burst The reason for this is that water expands when cooled radiation Energy transfer by convection is primarily restricted to uids If a volume of air is warmed it expands Ifa volume of air expands it cools The reason lightcolored clothes help keep you cool in warm weather is that clothes of light color re ect light Newton s Law of Cooling says that the rate of cooling depends on the objects surroundings Firewalkers who walk barefoot on redhot coals depend on poor conductivity of wood Systems that are left alone tend to move toward a state of entropy vibrations The time needed for a wave to make one complete cycle is its period The distance between successive identical parts of a wave is called its wavelength Hertz is a unit for freguency slower In which one of the following does sound travel the fastest solids Resonance occurs when waves reach the natural vibrations of an object transverse When a wave passes through an opening some of the wave is bent This is called diffraction Two like charges repel UI UI u 9 u gt1 VI 00 VI 0 ON 4 o gt1 68 Protons and electrons The SI unit of charge is the An ampere is a unit of electrical Fuses and circuit breakers are used to attract Coulomb s Law states that the force between any two charges depends on the sguare of the distance Objects can be charged by frictionconductioninduction coulomb A volt is a unit of potential difference current A Van de Graaff generator is a machine that generates high voltage A woman experiences an electric shock The electrons making the shock come from the woman s body In order for current to eXist in a circuit you must have complete path Electrical elements in our homes are connected in parallel I A I protect uskeep from V r from too much current coming in Moving electric charges will interact with magpetic elds creates an electric eld If the north pole of one magnet is brought neat the south pole of another magnet the poles will attract In order to make an electromagnet you need a wirebatterynail
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