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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 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.






2. 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.






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






4. An area of high air pressure that acts as the wave crest for sound waves. The spacing between successive compressions is the wavelength of sound - and the number of successive areas of compression that arrive at the ear per second is the frequency -






5. 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.






6. An electromagnetic wave of very high frequency.






7. 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.






8. Heat transfer by molecular collisions.






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






10. A unit for measuring angles; also called a "rad." 2p rad = 360º.






11. 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






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






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






14. 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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15. 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.






16. The longest side of a right triangle - opposite to the right angle.






17. The angle between a refracted ray and the line normal to the surface.






18. 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.






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






20. The experience of being in free fall. If you are in a satellite - elevator - or other free-falling object - then you have a weight of zero Newtons relative to that object.






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






22. When electromagnetic radiation shines upon a metal - the surface of the metal releases energized electrons. The way in which these electrons are released contradicts classical theories of electromagnetic radiation and supports the quantum view accord






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






24. The property of a vector that distinguishes it from a scalar: while scalars have only a magnitude - vectors have both a magnitude and a direction. When graphing vectors in the xy-coordinate space - direction is usually given by the angle measured cou






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






26. The bending of light at the corners of objects or as it passes through narrow slits or apertures.






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






28. 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.






29. A back-and-forth movement about an equilibrium position. Springs - pendulums - and other oscillators experience harmonic motion.






30. An object cannot be cooled to absolute zero.






31. 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






32. A vector quantity defined as the rate of change of the displacement vector with time. It is to be contrasted with speed - which is a scalar quantity for which no direction is specified.






33. Waves produced by a source that is moving with respect to the observer will seem to have a higher frequency and smaller wavelength if the motion is towards the observer - and a lower frequency and longer wavelength if the motion is away from the obse






34. In a right triangle - the tangent of a given angle is the length of the side opposite the angle divided by the length of the side adjacent to the triangle.






35. 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.






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






37. The gravitational force exerted on a given mass.






38. 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.






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






40. A form of vector multiplication - where two vectors are multiplied to produce a scalar. The dot product of two vectors - A and B - is expressed by the equation A · B = AB cos .






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






42. The distance between successive wave crests - or troughs. Wavelength is measured in meters and is related to frequency and wave speed by = v/f.






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






44. 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






45. Heat transfer via electromagnetic waves.






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






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

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48. A scale for measuring temperature - defined such that 0K is the lowest theoretical temperature a material can have. 273K = 0ºC.






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






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







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