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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 property of a metal - the minimum frequency of electromagnetic radiation that is necessary to release photoelectrons from that metal.






2. 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.






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






4. 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






5. The amount of error that's possible in a given measurement.






6. 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.






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






8. 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.






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






10. The cancellation of one wave by another wave that is exactly out of phase with the first. Despite the dramatic name of this phenomenon - nothing is "destroyed" by this interference—the two waves emerge intact once they have passed each other.






11. The application of kinematics to understand why objects move the way they do. More precisely - dynamics is the study of how forces cause motion.






12. 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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13. The path of each planet around the sun is an ellipse with the sun at one focus.

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






15. 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






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






17. The coefficient of static friction - for two materials is the constant of proportionality between the normal force and the maximum force of static friction. It is always a number between zero and one.






18. 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






19. 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.






20. Energy associated with the state of motion. The translational kinetic energy of an object is given by the equation .






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






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






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






24. A constant - - not to be confused with wavelength - that defines the speed at which a radioactive element undergoes decay. The greater is - the faster the element decays.






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






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






27. The time it takes a system to pass through one cycle of its repetitive motion. The period - T - is the inverse of the motion's frequency - f = 1/T.






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






29. The center of a mirror or lens.






30. The five equations used to solve problems in kinematics in one dimension with uniform acceleration.






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






32. An image created by a mirror or lens in such a way that light does actually come from where the image appears to be. If you place a screen in front of a real image - the image will be projected onto the screen.






33. 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.






34. A collision in which the colliding particles stick together.






35. A wave on a string that is tied to a pole at one end will reflect back toward its source - producing a wave that is the mirror-image of the original and which travels in the opposite direction.






36. The distance between the focal point and the vertex of a mirror or lens. For concave mirrors and convex lenses - this number is positive. For convex mirrors and concave lenses - this number is negative.






37. 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.






38. When an object is held in circular motion about a massive body - like a planet or a sun - due to the force of gravity - that object is said to be in orbit. Objects in orbit are in perpetual free fall - and so are therefore weightless.






39. A machine that operates by taking heat from a hot place - doing some work with that heat - and then exhausting the rest of the heat into a cool place. The internal combustion engine of a car is an example of a heat engine.






40. 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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41. 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.






42. 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






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

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44. An experiment in 1879 that showed that the speed of light is constant to all observers. Einstein used the results of this experiment as support for his theory of special relativity.






45. The unit of magnetic flux - equal to one T · m2.






46. 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.






47. 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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48. Heat transfer by molecular collisions.






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






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







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