Is light a wave or a particle?
A. a wave
B. a particle
C. both a wave and a particle at the same time
D. neither a wave nor a particle
E. Sometimes it is a wave, other times it is a particle.
Answer: D
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The Michelson-Morley experiment was designed to measure
A) the relativistic mass of the electron. B) the relativistic momentum of the electron. C) the relativistic energy of the electron. D) the velocity of the Earth relative to the ether. E) the acceleration of gravity on the Earth's surface.
A 10 kg ball weighs 98 N in air and weighs 75 N when submerged in water. The buoyant force of the water on the ball is
A. 32 N. B. 30 N. C. 24 N. D. 23 N. E. 19 N.
How does the largest asteroid, Ceres, compare in size to other solar system worlds?
A) It is larger than the planet Mars. B) It is larger than our Moon but smaller than Mercury. C) It is larger than Mercury but smaller than Mars. D) It is about a quarter the diameter of our Moon. E) It is about the size of the two moons of Mars.
Terminal Voltage and Internal Resistance: A battery you buy at the store has an internal emf of 3.0 V. If it has an internal resistance of 14.0 ?, that current will this battery put out if it is short-circuited?
A. 0.21 A B. 42 A C. 4.7 A D. 130 A