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






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






3. 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






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






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






6. A collision in which both kinetic energy and momentum are conserved.






7. 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.






8. 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






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






10. A logorithmic unit for measuring the volume of sound - which is the square of the amplitude of sound waves.






11. An object cannot be cooled to absolute zero.






12. The disorder of a system.






13. Heat transfer by molecular collisions.






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






15. 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.






16. The force of gravity - F - between two particles of mass and - separated by a distance r - has a magnitude of - where G is the gravitational constant. The force is directed along the line joining the two particles.

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17. A vector quantity - or vector - is an object possessing - and fully described by - a magnitude and a direction. Graphically a vector is depicted as an arrow with its magnitude given by the length of the arrow and its direction given by where the arro






18. Essentially a restatement of energy conservation - it states that the change in the internal energy of a system is equal to the heat added plus the work done on the system.






19. 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






20. A coefficient that tells how much a material will expand or contract lengthwise when it is heated or cooled.






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






22. A vector quantity - equal to the rate of change of the angular velocity vector with time. It is typically given in units of rad/s2.






23. Any vector can be expressed as the sum of two mutually perpendicular component vectors. Usually - but not always - these components are multiples of the basis vectors - and ; that is - vectors along the x-axis and y-axis. We define these two vectors






24. A vector of magnitude 1 along one of the coordinate axes. Generally - we take the basis vectors to be and - the vectors of length 1 along the x- and y-axes - respectively.






25. 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






26. 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.






27. The joule (J) is the unit of work and energy. A joule is 1 N · m or 1 kg · m2/s2.






28. The temperature at which a material will change phase from solid to liquid or liquid to solid.






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






30. 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.






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






32. 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.






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






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






35. The separation of different color light via refraction.






36. 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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37. 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






38. 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.






39. 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.






40. 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.






41. An electromagnetic wave of very high frequency.






42. 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.






43. Objects that experience oscillatory or simple harmonic motion when distorted. Their motion is described by Hooke's Law.






44. 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.






45. 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.






46. Waves in which the medium moves in the direction perpendicular to the propagation of the wave. Waves on a stretched string - water waves - and electromagnetic waves are all examples of transverse waves.






47. 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.






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






49. A form of radioactivity where an excited atom releases a photon of gamma radiation - thereby returning to a lower energy state. The atomic structure itself does not change in the course of gamma radiation.






50. For a reflected light ray - . In other words - a ray of light reflects of a surface in the same plane as the incident ray and the normal - and at an angle to the normal that is equal to the angle between the incident ray and the normal.