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SAT Subject Test: hysics

Subjects : sat, science, physics
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. When electromagnetic radiation shines upon a metal - the surface of the metal releases energized electrons. The way in which these electrons are released contradicts classical theories of electromagnetic radiation and supports the quantum view accord






2. The motion of a body in a circular path with constant speed.






3. A machine that operates by taking heat from a hot place - doing some work with that heat - and then exhausting the rest of the heat into a cool place. The internal combustion engine of a car is an example of a heat engine.






4. When an object is held in circular motion about a massive body - like a planet or a sun - due to the force of gravity - that object is said to be in orbit. Objects in orbit are in perpetual free fall - and so are therefore weightless.






5. The line that every particle in the rotating rigid body circles about.






6. Also called a diverging lens - a lens that is thinner in the middle than at the edges. Concave lenses refract light away from a focal point.






7. A measure of the average kinetic energy of the molecules in a system. Temperature is related to heat by the specific heat of a given substance.






8. The force involved in beta decay that changes a proton to a neutron and releases an electron and a neutrino.






9. Energy associated with the state of motion. The translational kinetic energy of an object is given by the equation .






10. A wavelength - given by = h/mv - which is associated with matter. Louis de Broglie proposed the idea that matter could be treated as waves in 1923 and applied this theory successfully to small particles like electrons.






11. In a right triangle - the sine of a given angle is the length of the side opposite the angle divided by the length of the hypotenuse.






12. A quantity that possesses a magnitude but not a direction. Mass and length are common examples.






13. The process by which a gas turns directly into a solid because it cannot exist as a liquid at certain pressures.






14. In reference to oscillation - amplitude is the maximum displacement of the oscillator from its equilibrium position. Amplitude tells how far an oscillator is swinging back and forth. In periodic motion - amplitude is the maximum displacement in each






15. A class of elementary particle whose mass is between that of a proton and that of an electron. A common kind of meson is the pion.






16. The experience of being in free fall. If you are in a satellite - elevator - or other free-falling object - then you have a weight of zero Newtons relative to that object.






17. If a line is drawn from the sun to the planet - then the area swept out by this line in a given time interval is constant.

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18. The points of maximum displacement along a wave. In traveling waves - the crests move in the direction of propagation of the wave. The crests of standing waves - also called anti-nodes - remain in one place.






19. A negatively charged particle that orbits the nucleus of the atom.






20. The energy of the molecules that make up an object. It is related to heat - which is the amount of energy transferred from one object to another object that is a different temperature.






21. The state of a nonrotating object upon whom the net torque acting is zero.






22. The energy of a particle moving in space. It is defined in s of a particle's mass - m - and velocity - v - as (1/2)mv2.






23. A scalar quantity that tells us how fast an object is moving. It measures the rate of change in distance over time. Speed is to be contrasted with velocity in that there is no direction associated with speed.






24. A pendulum consists of a bob connected to a rod or rope. At small angles - a pendulum's motion approximates simple harmonic motion as it swings back and forth without friction.






25. A coefficient that tells how much a material will expand or contract lengthwise when it is heated or cooled.






26. A measurement of a body's inertia - or resistance to being accelerated.






27. The emf created by the motion of a charge through a magnetic field.






28. The index of refraction n = c/v of a substance characterizes the speed of light in that substance - v. It also characterizes - by way of Snell's Law - the angle at which light refracts in that substance.






29. The property by which a charge moving in a magnetic field creates an electric field.






30. The amplification of one wave by another - identical wave of the same sign. Two constructively interfering waves are said to be "in phase."






31. A unit of force: 1 N is equivalent to a 1 kg · m/s2.






32. The cancellation of one wave by another wave that is exactly out of phase with the first. Despite the dramatic name of this phenomenon - nothing is "destroyed" by this interference—the two waves emerge intact once they have passed each other.






33. A small particle-like bundle of electromagnetic radiation.






34. A form of radioactive decay where a heavy element emits an alpha particle and some energy - thus transforming into a lighter - more stable - element.






35. The movement of a rigid body's center of mass in space.






36. A vector quantity defined as the product of the force acting on a body multiplied by the time interval over which the force is exerted.






37. In an interference or diffraction pattern - the places where there is the least light.






38. The model of the atom according to which negatively charged electrons orbit a positively charged nucleus. This model was developed by Ernest Rutherford in light of the results from his gold foil experiment.






39. A model for the atom developed in 1913 by Niels Bohr. According to this model - the electrons orbiting a nucleus can only orbit at certain particular radii. Excited electrons may jump to a more distant radii and then return to their ground state - em






40. The phenomenon of light bouncing off a surface - such as a mirror.






41. For a heat engine - the ratio of work done by the engine to heat intake. Efficiency is never 100%.






42. A vector quantity defined as the rate of change of the displacement vector with time. It is to be contrasted with speed - which is a scalar quantity for which no direction is specified.






43. Two quantities are directly proportional if an increase in one results in a proportional increase in the other - and a decrease in one results in a proportional decrease in the other. In a formula defining a certain quantity - those quantities to whi






44. Relates the angle of incidence to the angle of refraction: .

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45. With spherical mirrors - the radius of the sphere of which the mirror is a part.






46. A constant - - not to be confused with wavelength - that defines the speed at which a radioactive element undergoes decay. The greater is - the faster the element decays.






47. Indicates how "bouncy" or "stiff" a spring is. More specifically - the spring constant - k - is the constant of proportionality between the restoring force exerted by the spring - and the spring's displacement from equilibrium. The greater the value






48. A constant in the numerator of a formula.






49. When objects collide - each object feels a force for a short amount of time. This force imparts an impulse - or changes the momentum of each of the colliding objects. The momentum of a system is conserved in all kinds of collisions. Kinetic energy is






50. A device that converts mechanical energy to electrical energy by rotating a coil in a magnetic field; sometimes called a "dynamo."







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