Which of the following phrases best describes heat?
1.The total energy possessed by a body.
2.The flow of temperature to or from a body.
3.The amount of energy dissipated by friction.
4.The total energy flowing between two bodies at different temperatures.
5.The useful work that could be extracted from a body.
4
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For a system undergoing an isothermal expansion, the work done on the working fluid is:
A. May be either, depending on the temperature B. Positive C. Zero D. Negative
Pascal's Principle: A 13,000-N vehicle is to be lifted by a 25-cm diameter hydraulic piston. What force needs to be applied to a 5.0 cm diameter piston to accomplish this? Assume the pistons each have negligible weight.
A. 260 N B. 520 N C. 2600 N D. 5200 N
What do astronomers mean by a constellation?
A) A constellation is a region in the sky as seen from Earth. B) A constellation is a group of stars related through an ancient story. C) A constellation is any random grouping of stars in the sky. D) A constellation is a group of stars that are all located in about the same place in space.
The fourth harmonic of a complex tone has a frequency of 600 Hz. What is the frequency of the tone?