In the theory of cosmic inflation, what is it that experiences a large rapid increase?
A) the mass of the universe
B) the size of the universe
C) the net [or total] energy of the universe
D) the temperature of the universe
E) All of the above.
B
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(For discussion.) Which do you personally think is the weirdest aspect of quantum mechanics and why?
A. It does not support objectively real quanton properties. B. It requires possibly superluminal connections. C. It has two incompatible time evolution rules. D. There seems to be some kind of unexplained disconnect between microscopic and macroscopic physics.
Determine the rms voltage for the circuit.
A. 99 V (rms) B. 140 V (rms) C. 196 V (rms) D. 70 V (rms) E. 110 V (rms)
How many moons is Pluto known to have?
A) none B) three C) one D) four E) two
Fred swings a sheet of copper in pendulum fashion between the poles of a strong magnet. The sheet slows in entering the magnetic field because the field
A) induces swirling currents in the copper and accompanying magnetic fields that resist motion. B) experiences both air and magnetic friction. C) is repelled by free electrons in the copper. D) none of the above