The international standard thermometer is kept:
A. near Washington, D.C.
B. near Paris, France
C. near the north pole
D. near Rome, Italy
E. nowhere (there is none)
Ans: E. nowhere (there is none)
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In a laboratory experiment, you are given two unknown substances and a laser. One of the substances is a liquid in which you place the laser. The other is a tank made of a transparent solid. You aim the laser downward at the tank bottom – and find that the reflected ray is fully polarized when the angle of incidence is 54o. What is the transmitted angle for the ray transmitted into the tank bottom?
A. 
B. 
C. can’t answer this without knowing the indices of refraction.
D. 
In a metal specimen subjected to a constant electric field, the drift velocity of the free electrons is:
(a) The same for all free electrons. (b) A linearly increasing function of time for all free electrons. (c) Dependent upon the electron quantum numbers. (d) Dependent upon the electron energy.
Why do the patterns of the stars in our sky look the same from year to year?
A) because the stars in the constellations move so slowly-typically about the speed of a snail-that their motions are not noticeable B) because the stars in the constellations are so far away C) because the stars in the constellations are not moving D) because the stars in the constellations all move at the same speeds and in the same directions, so they don't change their relative positions
State Newton's third law of motion
What will be an ideal response?