What is the primary physical law responsible for the heating of the solar nebula as it collapsed?
a. conservation of energy
b. conservation of momentum
c. conservation of angular momentum
d. Kepler’s third law
Answer: a. conservation of energy
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The wind instrument with no keys or valves is a
A) trumpet. B) saxophone. C) clarinet. D) bugle.
When the temperature of a quantity of gas is increased
A. the pressure must increase. B. the volume must increase. C. the pressure and/or the volume must increase. D. none of the above
A silver dollar, a quarter, and a penny (these are in order of decreasing diameter) lie at the bottom of a wishing well filled with water. The coin experiencing the largest downward force on its top surface due to the water pressure is the
A. silver dollar. B. penny. C. quarter. D. All of these choices experience the same downward force
A rigid body rotates counterclockwise about a fixed axis for exactly one second. Each of the following pairs of quantities represents an initial angular position and a final angular position of the rigid body. Which choice represents the lowest angular speed?
1.3 rad, 6 rad 2.-1 rad, 1 rad 3.1 rad, 5 rad