If two electrons are at rest a short distance apart, they will feel
A) an attractive electric force, but no magnetic force.
B) a magnetic force but no electric force.
C) a repulsive electric force, but no magnetic force.
D) no electromagnetic forces.
E) both electric and magnetic forces.
C
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The energy of a ball rolling up an inclined plane
a. is entirely kinetic. b. is entirely potential. c. is both kinetic and potential. d. none of the above
The Himalayan Mountains formed at which type of plate boundary?
A) transform—fault boundary B) Oceanic—continental convergent boundary C) divergent boundary D) continental—continental convergent boundary
Specific gravity is a number representing the ratio of a mineral's weight to the weight of an equal volume of water.
TRUE FALSE
A car of mass 1000 kg moves with a speed of 50 m/s on a circular track of radius 100 m. What is the magnitude of its angular momentum (in kg/m2/s) relative to the center of the race track?
a. 5.0 × 10^2 b. 5.0 × 10^6 c. 2.5 × 10^4 d. 2.5 × 10^6 e. 5.0 × 10^3