As a rock sinks deeper and deeper into water of constant density, what happens to the buoyant force on it if it started above the surface of the water?
A) The buoyant force keeps increasing steadily.
B) The buoyant force remains constant.
C) The buoyant force first increases and then remains constant.
D) The buoyant force steadily decreases.
C
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I the inductance and the capacitance both double in an LRC series circuit, the resonate frequency of that circuit will
A. decrease by a factor of 1?2. B. decrease by a factor of 1/4. C. increase by a factor of 2. D. increase by a factor of 4.
Diagrams like this one are commonly used in discussions of seasons and they can be quite useful. However, this diagram greatly exaggerates
A) the size of Earth relative to the size of Earth's orbit around the Sun. B) the size of the Sun relative to the size of Earth's orbit around the Sun. C) the amount by which Earth's orbit differs from a perfect circle. D) all of the answers listed. E) only the first and third choices.
Motion in a circle at constant speed is motion with
a. constant acceleration. b. constant velocity. c. both of the above d. none of the above
When a car goes around a curve of smaller and smaller radius, the centripetal force on it decreases
a. True b. False Indicate whether the statement is true or false