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SAT Subject Test: Physics
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SAT Subject Test: Physics
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25 Questions

1. The phenomenon of light bouncing off a surface - such as a mirror.

2. A wedge or a slide. The dynamics of objects sliding down inclined planes is a popular topic on SAT II Physics.

3. 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.

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

5. 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.

6. 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.

7. A transverse traveling wave created by the oscillations of an electric field and a magnetic field. Electromagnetic waves travel at the speed of light - m/s. Examples include microwaves - X rays - and visible light.

8. In the Bohr model of the atom - the state in which an electron has the least energy and orbits closest to the nucleus.

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

10. 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.

11. 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.

12. A unit of force: 1 N is equivalent to a 1 kg · m/s2.

13. If two systems - A and B - are in thermal equilibrium and if B and C are also in thermal equilibrium - then systems A and C are necessarily in thermal equilibrium.

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

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

16. An almost massless particle of neutral charge that is released along with a beta particle in beta decay.

17. In a right triangle - the sine of a given angle is the length of the side opposite the angle divided by the length of the hypotenuse.

18. 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.

19. 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.

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

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

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

23. The model of the atom according to which negatively charged electrons orbit a positively charged nucleus. This model was developed by Ernest Rutherford in light of the results from his gold foil experiment.

24. In the graphical representation of vectors - the tip of the arrow is the pointy end.

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