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






2. 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.






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






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

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5. When dealing with reflection or refraction - the incident ray is the ray of light before it strikes the reflecting or refracting surface.






6. 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.






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






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






9. 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.






10. 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.






11. 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.






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






13. An object at rest remains at rest - unless acted upon by a net force. An object in motion remains in motion - unless acted upon by a net force.

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14. 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






15. For an oscillating spring - the restoring force exerted by the spring is directly proportional to the displacement. That is - the more the spring is displaced - the stronger the force that will pull toward the equilibrium position. This law is expres

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






17. A nuclear reaction that takes place only at very high temperatures. Two light atoms - often hydrogen - fuse together to form a larger single atom - releasing a vast amount of energy in the process.






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






19. Heat transfer via electromagnetic waves.






20. 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.






21. The energy stored in a thermodynamic system.






22. Done when energy is transferred by a force. The work done by a force F in displacing an object by s is W = F · s.






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






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

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25. The amount of heat necessary for a material undergoing sublimation to make a phase change from gas to solid or solid to gas - without a change in temperature.






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

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27. 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.






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






29. 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 -






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






31. 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.






32. A measure of force per unit area. Pressure is measured in N/m2 or Pa.






33. A wave that interferes with its own reflection so as to produce oscillations which stand still - rather than traveling down the length of the medium. Standing waves on a string with both ends tied down make up the harmonic series.






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






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






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






37. Atoms of the same element may have different numbers of neutrons and therefore different masses. Atoms of the same element but with different numbers of neutrons are called isotopes of the same element.






38. A unit of measurement for energy on atomic levels. 1 eV = J.






39. A sheet - film - or screen with a pattern of equally spaced slits. Typically the width of the slits and space between them is chosen to generate a particular diffraction pattern.






40. A scalar quantity. If an object is moved from point A to point B in space along path AB - the distance that the object has traveled is the length of the path AB. Distance is to be contrasted with displacement - which is simply a measure of the distan






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






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






43. F = ma. The net force - F - acting on an object causes the object to accelerate - a. The magnitude of the acceleration is directly proportional to the net force on the object and inversely proportional to the mass - m - of the object.

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






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






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






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






48. The standing wave with the lowest frequency that is supported by a string with both ends tied down is called the fundamental - or resonance - of the string. The wavelength of the fundamental is twice the length of the string - .






49. The study of the properties of visible light - i.e. - the portion of the electromagnetic spectrum with wavelengths between 360 and 780 nm (1 nm = m/s).






50. The building blocks of all matter - quarks are the constituent parts of protons - neutrons - and mesons.







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