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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. 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.






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






3. The energy of the molecules that make up an object. It is related to heat - which is the amount of energy transferred from one object to another object that is a different temperature.






4. The mass number - A - is the sum of the number of protons and neutrons in a nucleus. It is very close to the weight of that nucleus in atomic mass units.






5. 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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6. The energy of a particle rotating around an axis.






7. 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.






8. A frequency - f - defined as the number of revolutions a rigid body makes in a given time interval. It is a scalar quantity commonly denoted in units of Hertz (Hz) or s-1.






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






10. A means of defining the direction of the cross product vector. To define the direction of the vector - position your right hand so that your fingers point in the direction of A - and then curl them around so that they point in the direction of B. Th






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






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






13. An object cannot be cooled to absolute zero.






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






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






16. The bending of light at the corners of objects or as it passes through narrow slits or apertures.






17. An electromagnetic wave of very high frequency.






18. An area of high air pressure that acts as the wave crest for sound waves. The spacing between successive compressions is the wavelength of sound - and the number of successive areas of compression that arrive at the ear per second is the frequency -






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






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






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






22. Heat transfer via electromagnetic waves.






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






24. 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.






25. 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.






26. The center of a mirror or lens.






27. The force transmitted along a rope or cable.






28. The bending of light as it passes from one medium to another. Light refracts toward the normal when going from a less dense medium into a denser medium and away from the normal when going from a denser medium into a less dense medium.






29. A device that breaks incoming light down into spectral rays - so that one can see the exact wavelength constituents of the light.






30. 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).






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






32. 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.






33. The energy stored in a thermodynamic system.






34. A scale for measuring temperature - defined such that 0K is the lowest theoretical temperature a material can have. 273K = 0ºC.






35. The ray of light that is refracted through a surface into a different medium.






36. 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.






37. Life- The amount of time it takes for one-half of a radioactive sample to decay.






38. 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






39. 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.






40. Energy cannot be made or destroyed; energy can only be changed from one place to another or from one form to another.






41. A rigid body's resistance to being rotated. The moment of inertia for a single particle is MR2 - where M is the mass of the rigid body and R is the distance to the rotation axis. For rigid bodies - calculating the moment of inertia is more complicate






42. 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.






43. A body or set of bodies that we choose to analyze as a group.






44. 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.






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






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






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






48. 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.






49. The process by which a solid turns directly into gas - because it cannot exist as a liquid at a certain pressure.






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







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