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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 two shorter sides of a right triangle that meet at the right angle.






3. 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.






4. A system that no external net force acts upon. Objects within the system may exert forces upon one another - but they cannot receive any impulse from outside forces. Momentum is conserved in isolated systems.






5. A neutrally charged particle that - along with protons - constitutes the nucleus of an atom.






6. 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






7. 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






8. A mirror that is curved such that its center is farther from the viewer than the edges - such as the front of a spoon. Concave mirrors reflect light through a focal point.






9. An object is called radioactive if it undergoes radioactive decay.






10. In the Bohr model of the atom - the state in which an electron has the least energy and orbits closest to the nucleus.






11. 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






12. The gravitational force exerted on a given mass.






13. 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






14. The points of maximum negative displacement along a wave. They are the opposite of wave crests.






15. The property by which a changing current in one coil of wire induces an emf in another.






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






17. 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.






18. The disorder of a system.






19. 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.






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






21. Waves produced by a source that is moving with respect to the observer will seem to have a higher frequency and smaller wavelength if the motion is towards the observer - and a lower frequency and longer wavelength if the motion is away from the obse






22. The current induced in a circuit by a change in magnetic flux.






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






24. The name of an electron released from the surface of a metal due to the photoelectric effect.






25. An image created by a mirror or lens in such a way that light does actually come from where the image appears to be. If you place a screen in front of a real image - the image will be projected onto the screen.






26. A conserved scalar quantity associated with the state or condition of an object or system of objects. We can roughly define energy as the capacity for an object or system to do work. There are many different types of energy - such as kinetic energy -






27. The straight line that runs through the focal point and the vertex of a mirror or lens.






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






29. An equation - PV = nRT - that relates the pressure - volume - temperature - and quantity of an ideal gas. An ideal gas is one that obeys the approximations laid out in the kinetic theory of gases.






30. 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.






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






32. In the graphical representation of vectors - the tip of the arrow is the pointy end.






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






34. 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.






35. The separation of different color light via refraction.






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






37. A back-and-forth movement about an equilibrium position. Springs - pendulums - and other oscillators experience harmonic motion.






38. A particle - identical to an electron. Beta particles are ejected from an atom in the process of beta decay.






39. 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






40. The amount heat necessary to cause a substance to undergo a phase transition.






41. An experiment in 1879 that showed that the speed of light is constant to all observers. Einstein used the results of this experiment as support for his theory of special relativity.






42. A form of vector multiplication - where two vectors are multiplied to produce a third vector. The cross product of two vectors - A and B - separated by an angle - - is - where is a unit vector perpendicular to both A and B. To deine which direction






43. Kinematics is the study and description of the motion of objects.






44. The center of an atom - where the protons and neutrons reside. Electrons then orbit this nucleus.






45. The principle stating that for any isolated system - linear momentum is constant with time.






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






47. A constant in the numerator of a formula.






48. 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.






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

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