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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 number of cycles executed by a system in one second. Frequency is the inverse of period - f = 1/T. Frequency is measured in hertz - Hz.






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






3. 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 -






4. A form of vector multiplication - where two vectors are multiplied to produce a scalar. The dot product of two vectors - A and B - is expressed by the equation A · B = AB cos .






5. The process by which unstable nuclei spontaneously release particles and/or energy so as to come to a more stable arrangement. The most common forms of radioactive decay are alpha decay - beta decay - and gamma decay.






6. The amount of heat necessary to transform a solid at a given temperature into a liquid of the same temperature - or the amount of heat needed to be removed from a liquid of a given temperature to transform it into a solid of the same temperature.






7. The force between two surfaces that are not moving relative to one another. The force of static friction is parallel to the plane of contact between the two objects and resists the force pushing or pulling on the object.






8. The reaction force of the ground - a table - etc. - when an object is placed upon it. The normal force is a direct consequence of Newton's Third Law: when an object is placed on the ground - the ground pushes back with the same force that it is pushe






9. 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.






10. The points midway between nodes on a standing wave - where the oscillations are largest.






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






12. When two waves of slightly different frequencies interfere with one another - they produce a "beating" interference pattern that alternates between constructive (in-phase) and destructive (out-of-phase). In the case of sound waves - this sort of inte






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






14. The building blocks of all matter - atoms are made up of a nucleus consisting of protons and neutrons - and a number of electrons that orbit the nucleus. An electrically neutral atom has as many protons as it has electrons.






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






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






18. 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.






19. With spherical mirrors - the center of the sphere of which the mirror is a part. All of the normals pass through it.






20. 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.






21. The points on a standing wave where total destructive interference causes the medium to remain fixed at its equilibrium position.






22. The force necessary to maintain a body in uniform circular motion. This force is always directed radially toward the center of the circle.






23. Linear momentum - p - commonly called "momentum" for short - is a vector quantity defined as the product of an object's mass - m - and its velocity - v.






24. 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.






25. 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






26. A scale for measuring temperature - defined such that water freezes at 0ºC and boils at 100ºC. 0ºC = 273 K.






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

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






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






30. An object that retains its overall shape - meaning that the particles that make up the rigid body stay in the same position relative to one another.






31. Given the trajectory of an object or system - the center of mass is the point that has the same acceleration as the object or system as a whole would have if its mass were concentrated at that point. In terms of force - the center of mass is the poin






32. 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.






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






34. An area of high air pressure that acts as the wave trough for sound waves. The spacing between successive rarefactions is the wavelength of sound - and the number of successive areas of rarefaction that arrive at the ear per second is the frequency -






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






36. Another word for the frequency of a sound wave.






37. The units of frequency - defined as inverse-seconds (1 Hz = 1 s-1). "Hertz" can be used interchangeably with "cycles per second."






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






39. The substance that is displaced as a wave propagates through it. Air is the medium for sound waves - the string is the medium of transverse waves on a string - and water is the medium for ocean waves. Note that even if the waves in a given medium tra






40. The amount of heat needed to raise the temperature of one gram of water by one degree Celsius. 1 cal = 4.19 J.






41. The time it takes a system to pass through one cycle of its repetitive motion. The period - T - is the inverse of the motion's frequency - f = 1/T.






42. 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.






43. The sum of a system's potential and kinetic energy. In many systems - including projectiles - pulleys - pendulums - and motion on frictionless surfaces - mechanical energy is conserved. One important type of problem in which mechanical energy is not






44. A pulley is a simple machine that consists of a rope that slides around a disk or block.






45. A number - Z - associated with the number of protons in the nucleus of an atom. Every element can be defined in s of its atomic number - since every atom of a given element has the same number of protons.






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






47. The time - T - required for a rigid body to complete one revolution.






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






49. An almost massless particle of neutral charge that is released along with a beta particle in beta decay.






50. 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.







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