The first laboratory discovery of nuclear fission occurred
A) in Marie Curie's lab in the early 1900s.
B) in London in 1930.
C) in Germany in 1938.
D) in New Mexico in 1944
E) in the United States in 1940.
C
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The four fundamental forces are
A) strong force, weak force, electromagnetic force, and gravity. B) strong force, weak force, electric force, and magnetic force. C) nuclear force, electromagnetic force, gravity, and tidal force. D) nuclear force, gravity, electric force, and magnetic force.
A 4.00 kg hollow cylinder of radius 5.00 cm starts from rest and rolls without slipping down a 30.0 degree incline. If the length of the incline is 50.0 cm, then the velocity of the center of mass of the cylinder at the bottom of the incline is
A. 1.35 
B. 1.82
C. 1.57
D. 2.55
E. 3.02
A rocket accelerates due to the force exerted on it by the
a. fuel. b. oxidizer. c. exhaust gases. d. nozzle. e. booster.
What is the temperature of a system in thermal equilibrium with another system made up of water and steam at one atmosphere of pressure?
a. 0°F c. 0 K b. 273 K d. 100°C