The efficiency of a Carnot engine operating between 95°C and 0°C is most nearly
a. 13%.
b. 52%.
c. 26%.
d. 80%
e. 100%
c
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The mass of a single galaxy might be found by
a. the double galaxy method. b. the rotation curve method. c. the cluster method. d. any of these methods. e. none of these methods.
Power: The circuit power factor of an RC circuit is 0.620. The rms value of the ac voltage applied to this signal is 120 V and the impedance is 200 ?. What is the average power of this circuit?
A. 44.6 W B. 89.2 W C. 60.0 W D. 0.620 W E. 124 W
A water hose has a flow rate of 3.0 kg/s of water. If the velocity of the water as it leaves the hose is 5.0 m/s, then the force to hold the hose is
A. 15 N. B. 26 N. C. 30 N. D. 45 N. E. 57 N.
The crust on the near side of the Moon is on average thinner than the crust on the far side, due to our tidal pull on the Moon
Indicate whether the statement is true or false