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






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






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






4. Waves carried by variations in air pressure. The speed of sound waves in air at room temperature and pressure is roughly 343 m/s.






5. If two systems - A and B - are in thermal equilibrium and if B and C are also in thermal equilibrium - then systems A and C are necessarily in thermal equilibrium.






6. A device made of two coils - which converts current of one voltage into current of another voltage. In a step-up transformer - the primary coil has fewer turns than the secondary - thus increasing the voltage. In a step-down transformer - the seconda






7. A law - || = - which states that the induced emf is the change in magnetic flux in a certain time.

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8. A vector quantity - L - that is the rotational analogue of linear momentum. For a single particle - the angular momentum is the cross product of the particle's displacement from the axis of rotation and the particle's linear momentum - . For a rigid






9. A logorithmic unit for measuring the volume of sound - which is the square of the amplitude of sound waves.






10. In oscillation - a cycle occurs when an object undergoing oscillatory motion completes a "round-trip." For instance - a pendulum bob released at angle has completed one cycle when it swings to and then back to again. In period motion - a cycle is the






11. 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






12. Heat transfer via the mass movement of molecules.






13. A positively charged particle that - along with the neutron - occupies the nucleus of the atom.






14. An object that moves about a stable equilibrium point and experiences a restoring force that is directly proportional to the oscillator's displacement.






15. The energy of a particle rotating around an axis.






16. A process that aligns a wave of light to oscillate in one dimension rather than two.






17. The lowest theoretical temperature a material can have - where the molecules that make up the material have no kinetic energy. Absolute zero is reached at 0 K or -273º C.






18. The temperature at which a material will change phase from solid to liquid or liquid to solid.






19. A property of a metal - the minimum frequency of electromagnetic radiation that is necessary to release photoelectrons from that metal.






20. The mass difference between a nucleus and the sum of the masses of the constituent protons and neutrons.






21. The spectrum containing all the different kinds of electromagnetic waves - ranging in wavelength and frequency.






22. Objects that experience oscillatory or simple harmonic motion when distorted. Their motion is described by Hooke's Law.






23. An image created by a mirror or lens in such a way that light does not actually come from where the image appears to be.






24. Waves in which the medium moves in the direction perpendicular to the propagation of the wave. Waves on a stretched string - water waves - and electromagnetic waves are all examples of transverse waves.






25. The tendency of an object to remain at a constant velocity - or its resistance to being accelerated. Newton's First Law is alternatively called the Law of Inertia because it describes this tendency.






26. The speed at which a wave crest or trough propagates. Note that this is not the speed at which the actual medium (like the stretched string or the air particles) moves.






27. The point of a mirror or lens where all light that runs parallel to the principal axis will be focused. Concave mirrors and convex lenses are designed to focus light into the focal point. Convex mirrors and concave lenses focus light away from the fo






28. Represented by R = 8.31 J/mol · K - the universal gas constant fits into the ideal gas law so as to relate temperature to the average kinetic energy of gas molecules.






29. 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.






30. The force between two surfaces moving relative to one another. The frictional force is parallel to the plane of contact between the two objects and in the opposite direction of the sliding object's motion.






31. For a gas held at constant pressure - temperature and volume are directly proportional.

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32. The force that binds protons and neutrons together in the atomic nucleus.






33. The ratio of the size of the image produced by a mirror or lens to the size of the original object. This number is negative if the image is upside-down.






34. The dot product of the area and the magnetic field passing through it. Graphically - it is a measure of the number and length of magnetic field lines passing through that area. It is measured in Webers (Wb).






35. The phenomenon by which light traveling from a high n to a low n material will reflect from the optical interface if the incident angle is greater than the critical angle.






36. A vector quantity - equal to the rate of change of the angular velocity vector with time. It is typically given in units of rad/s2.






37. A transfer of thermal energy from one system to another.






38. The distance between successive wave crests - or troughs. Wavelength is measured in meters and is related to frequency and wave speed by = v/f.






39. 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.






40. Waves that oscillate in the same direction as the propagation of the wave. Sound is carried by longitudinal waves - since the air molecules move back and forth in the same direction the sound travels.






41. For two given media - the smallest angle of incidence at which total internal reflection occurs.






42. A force caused by the roughness of two materials in contact - deformations in the materials - and a molecular attraction between the materials. Frictional forces are always parallel to the plane of contact between two surfaces and opposite the direct






43. The coefficient of kinetic friction - - for two materials is the constant of proportionality between the normal force and the force of kinetic friction. It is always a number between zero and one.






44. The force that causes simple harmonic motion. The restoring force is always directed toward an object's equilibrium position.






45. 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.






46. The particles and energy released by the fission or fusion of one atom may trigger the fission or fusion of further atoms. In a chain reaction - fission or fusion is rapidly transferred to a large number of atoms - releasing tremendous amounts of ene






47. In radioactive substances - the number of nuclei that decay per second. Activity - A - will be larger in large samples of radioactive material - since there will be more nuclei.






48. Light such that all of the associated waves have the same wavelength and are in phase.






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. 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.







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