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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. With spherical mirrors - the radius of the sphere of which the mirror is a part.






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






3. 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.






4. The number - N - of neutrons in an atomic nucleus.






5. A transfer of thermal energy from one system to another.






6. A mirror that is curved such that its center is closer to the viewer than the edges - such as a doorknob. Convex mirrors reflect light away from a focal point.






7. 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.






8. 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.






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






11. 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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12. 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.






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

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14. 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






15. Given the period - T - and semimajor axis - a - of a planet's orbit - the ratio is the same for every planet.

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16. 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.






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






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






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






20. The disorder of a system.






21. Heat transfer by molecular collisions.






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






23. 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






24. A positively charged particle that - along with the neutron - occupies the nucleus of the atom.






25. 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.






26. The point of a mirror or lens where all light that runs parallel to the principal axis will be focused. Concave mirrors and convex lenses are designed to focus light into the focal point. Convex mirrors and concave lenses focus light away from the fo






27. 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.






28. 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 - .






29. 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.






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






31. 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.






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






33. 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






34. 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.






35. There are a few versions of this law. One is that heat flows spontaneously from hot to cold - but not in the reverse direction. Another is that there is no such thing as a 100% efficient heat engine. A third states that the entropy - or disorder - of






36. The stable position of a system where the net force acting on the object is zero.






37. A rough approximation of how gases work - that is quite accurate in everyday conditions. According to the kinetic theory - gases are made up of tiny - round molecules that move about in accordance with Newton's Laws - and collide with one another and






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






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






40. 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






41. 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.






42. 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






43. 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.






44. A property common to both vectors and scalars. In the graphical representation of a vector - the vector's magnitude is equal to the length of the arrow.






45. An object cannot be cooled to absolute zero.






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






47. The force transmitted along a rope or cable.






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






49. The energy stored in a thermodynamic system.






50. 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







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