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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 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






2. A transfer of thermal energy. We don't speak about systems "having" heat - but about their "transferring" heat - much in the way that dynamical systems don't "have" work - but rather "do" work.






3. 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.






4. A collision in which momentum is conserved but kinetic energy is not.






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






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






7. A constant - J · s - which is useful in quantum physics. A second constant associated with Planck's constant is .

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






9. Defined as the rate at which work is done - or the rate at which energy is transformed. P is measured in joules per second (J/s) - or watts (W).






10. A principle derived by Werner Heisenberg in 1927 that tells us that we can never know both the position and the momentum of a particle at any given time.






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






12. Occurs when every point in the rigid body moves in a circular path around a line called the axis of rotation.






13. The distance between the focal point and the vertex of a mirror or lens. For concave mirrors and convex lenses - this number is positive. For convex mirrors and concave lenses - this number is negative.






14. Heat transfer by molecular collisions.






15. 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.






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






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






18. 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.






19. 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.






20. 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.






21. A vector quantity - - that reflects the change of angular displacement with time - and is typically given in units of rad/s. To find the direction of the angular velocity vector - take your right hand and curl your fingers along the particle or body






22. An object cannot be cooled to absolute zero.






23. A particle - which consists of two protons and two neutrons. It is identical to the nucleus of a helium atom and is ejected by heavy particles undergoing alpha decay.






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






25. Also called a converging lens - a lens that is thicker in the middle than at the edges. Convex lenses refract light through a focal point.






26. 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






27. 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.






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 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.






30. 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 -






31. 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.






32. In the graphical representation of vectors - the tail of the arrow is the blunt end (the end without a point).






33. The number of digits that have been accurately measured. When combining several measurements in a formula - the resulting calculation can only have as many significant digits as the measurement that has the smallest number of significant digits.






34. The acceleration of a body experiencing uniform circular motion. This acceleration is always directed toward the center of the circle.






35. A constant in the numerator of a formula.






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






37. Two materials are in thermal equilibrium if they are at the same temperature.






38. The temperature at which a material will change phase from liquid to gas or gas to liquid.






39. The cosine of an angle in a right triangle is equal to the length of the side adjacent to the angle divided by the length of the hypotenuse.






40. An experiment by Ernest Rutherford that proved for the first time that atoms have nuclei.






41. A system with many parts in periodic - or repetitive - motion. The oscillations in one part cause vibrations in nearby parts.






42. The net change - - in a point's angular position - . It is a scalar quantity.






43. 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.






44. The angle between a refracted ray and the line normal to the surface.






45. 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.






46. The five equations used to solve problems in kinematics in one dimension with uniform acceleration.






47. The amount of energy that metal must absorb before it can release a photoelectron from the metal.






48. A unit vector is a vector with length 1.






49. 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 -






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







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