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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 emf created by the motion of a charge through a magnetic field.






2. A force caused by the roughness of two materials in contact - deformations in the materials - and a molecular attraction between the materials. Frictional forces are always parallel to the plane of contact between two surfaces and opposite the direct






3. 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






4. 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.






5. The lowest theoretical temperature a material can have - where the molecules that make up the material have no kinetic energy. Absolute zero is reached at 0 K or -273º C.






6. 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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7. 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






8. 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.






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






10. A vector quantity defined as the product of the force acting on a body multiplied by the time interval over which the force is exerted.






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






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






13. A form of radioactive decay where a heavy element ejects a beta particle and a neutrino - becoming a lighter element in the process.






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






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






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






17. 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.






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. A constant in the numerator of a formula.






20. When objects collide - each object feels a force for a short amount of time. This force imparts an impulse - or changes the momentum of each of the colliding objects. The momentum of a system is conserved in all kinds of collisions. Kinetic energy is






21. A wavelength - given by = h/mv - which is associated with matter. Louis de Broglie proposed the idea that matter could be treated as waves in 1923 and applied this theory successfully to small particles like electrons.






22. For a gas held at a constant temperature - pressure and volume are inversely proportional.

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23. The separation of different color light via refraction.






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






25. The principle by which the displacements from different waves traveling in the same medium add up. Superposition is the basis for interference.






26. A push or a pull that causes an object to accelerate.






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

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






29. In a right triangle - the sine of a given angle is the length of the side opposite the angle divided by the length of the hypotenuse.






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






31. 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






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






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






34. 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.






35. 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.






36. 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






37. An equation - PV = nRT - that relates the pressure - volume - temperature - and quantity of an ideal gas. An ideal gas is one that obeys the approximations laid out in the kinetic theory of gases.






38. 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.






39. 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






40. 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.






41. Body diagram- Illustrates the forces acting on an object - drawn as vectors originating from the center of the object.






42. A vector quantity defined as the rate of change of the velocity vector with time.






43. The effect of force on rotational motion.






44. 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.






45. A vector quantity - L - that is the rotational analogue of linear momentum. For a single particle - the angular momentum is the cross product of the particle's displacement from the axis of rotation and the particle's linear momentum - . For a rigid






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






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






48. The movement of a rigid body's center of mass in space.






49. The force transmitted along a rope or cable.






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