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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 separation of different color light via refraction.






2. A device made of two coils - which converts current of one voltage into current of another voltage. In a step-up transformer - the primary coil has fewer turns than the secondary - thus increasing the voltage. In a step-down transformer - the seconda






3. A wave with wave crests that propagate down the length of the medium - in contrast to stationary standing waves. The velocity at which a crest propagates is called the wave speed.






4. The center of an atom - where the protons and neutrons reside. Electrons then orbit this nucleus.






5. Also called a diverging lens - a lens that is thinner in the middle than at the edges. Concave lenses refract light away from a focal point.






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






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






8. 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.






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






10. The amount of heat of a material required to raise the temperature of either one kilogram or one gram of that material by one degree Celsius. Different units may be used depending on whether specific heat is measured in s of grams or kilograms - and






11. 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.






12. A device that converts mechanical energy to electrical energy by rotating a coil in a magnetic field; sometimes called a "dynamo."






13. The points of maximum displacement along a wave. In traveling waves - the crests move in the direction of propagation of the wave. The crests of standing waves - also called anti-nodes - remain in one place.






14. 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.






15. 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






16. The straight line that runs through the focal point and the vertex of a mirror or lens.






17. The two shorter sides of a right triangle that meet at the right angle.






18. A number - Z - associated with the number of protons in the nucleus of an atom. Every element can be defined in s of its atomic number - since every atom of a given element has the same number of protons.






19. The force involved in beta decay that changes a proton to a neutron and releases an electron and a neutrino.






20. 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.






21. 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.






22. 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.






23. 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.






24. The energy of a particle rotating around an axis.






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






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

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27. 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.






28. 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.






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






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

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31. The unit for measuring pressure. One Pascal is equal to one Newton per meter squared - 1 Pa = 1 N/m2.






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






33. The energy stored in a thermodynamic system.






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






35. The points midway between nodes on a standing wave - where the oscillations are largest.






36. Heat transfer by molecular collisions.






37. 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.






38. A vector quantity - commonly denoted by the vector s - which reflects an object's change in spatial position. The displacement vector points from the object's starting position to the object's current position in space. If an object is moved from poi






39. 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.






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






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






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






43. 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.






44. 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.






45. 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.






46. 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.






47. Energy associated with an object's position in space - or configuration in relation to other objects. This is a latent form of energy - where the amount of potential energy reflects the amount of energy that potentially could be released as kinetic e






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






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






50. The number of digits that have been accurately measured. When combining several measurements in a formula - the resulting calculation can only have as many significant digits as the measurement that has the smallest number of significant digits.







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