The two major physical theories of the 20th century are
A) superconductivity and the theory of light.
B) electromagnetic theory and quantum theory.
C) quantum theory and the theory of relativity.
D) the theory of relativity and electromagnetic theory.
E) electromagnetic theory and the theory of gravity.
C
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As more resistors are added in series to a constant voltage source (zero internal resistance), the power supplied by the source
A) does not change. B) decreases. C) increases. D) increases for a time and then starts to decrease.
A uniform film of oil (n = 1.31) is floating on water. When sunlight in air is incident normally on the film, an observer finds that the reflected light has a brightness maximum at ? = 450 nm and a brightness minimum at ? = 600 nm. What is the thickness of the oil film?
A spaceship approaching an asteroid at a speed of 0.60c launches a rocket forward with a speed of 0.40c relative to the spaceship. At what speed is the rocket approaching the asteroid as measured by an astronaut on the asteroid?
A) 0.81c B) 1.0c C) 0.76c D) 0.64c E) 0.96c
The top quark
a. is the only quark not yet detected experimentally. b. has been shown not to exist. c. was discovered at Fermilab. d. none of the above