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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. 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.






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






3. 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.






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






5. 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.






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






8. 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






9. 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






10. A nuclear reaction in which a high-energy neutron bombards a heavy - unstable atomic nucleus - causing it to split into two smaller nuclei - and releasing some neutrons and a vast amount of energy at the same time






11. A small particle-like bundle of electromagnetic radiation.






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






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






14. 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






15. A conserved scalar quantity associated with the state or condition of an object or system of objects. We can roughly define energy as the capacity for an object or system to do work. There are many different types of energy - such as kinetic energy -






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






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






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

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






20. 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.






21. A coefficient that tells how much the volume of a solid will change when it is heated or cooled.






22. The number of hydrogen atoms in one gram of hydrogen - equal to . When counting the number of molecules in a gas - it is often convenient to count them in moles.






23. An object that retains its overall shape - meaning that the particles that make up the rigid body stay in the same position relative to one another.






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






25. 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






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






27. 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






28. A logorithmic unit for measuring the volume of sound - which is the square of the amplitude of sound waves.






29. 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.






30. The energy stored in a thermodynamic system.






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






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






33. The force between two surfaces that are not moving relative to one another. The force of static friction is parallel to the plane of contact between the two objects and resists the force pushing or pulling on the object.






34. To every action - there is an equal and opposite reaction. If an object A exerts a force on another object B - B will exert on A a force equal in magnitude and opposite in direction to the force exerted by A.

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35. The dot product of the area and the magnetic field passing through it. Graphically - it is a measure of the number and length of magnetic field lines passing through that area. It is measured in Webers (Wb).






36. 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.






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






38. 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.






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






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






41. Energy cannot be made or destroyed; energy can only be changed from one place to another or from one form to another.






42. 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.






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






44. A constant in the numerator of a formula.






45. The force that causes simple harmonic motion. The restoring force is always directed toward an object's equilibrium position.






46. In oscillation - a cycle occurs when an object undergoing oscillatory motion completes a "round-trip." For instance - a pendulum bob released at angle has completed one cycle when it swings to and then back to again. In period motion - a cycle is the






47. The constant of proportionality in Newton's Law of Gravitation. It reflects the proportion of the gravitational force and - the product of two particles' masses divided by the square of the bodies' separation. N · m2/kg2.






48. 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






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






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