A sled weighs 325 N. It is held in place on a frictionless 30.0° slope by a rope attached to a stake at the top; the rope is parallel to the slope. Find the tension in the rope
a. 281 N
b. 650 N
c. 375 N
d. 163 N
e. 188 N
d
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Thermodynamic Processes: An ideal gas is compressed isothermally to one-third of its initial volume. The resulting pressure will be
A. three times as large as the initial value. B. less than three times as large as the initial value. C. more than three times as large as the initial value. D. equal to the initial value. E. impossible to predict on the basis of this data.
Among the other planets, probably the most likely place to find evidence for life either now or in the past is on
A) Venus B) Mercury C) Jupiter D) Mars
0.45 kg of a metal at 90.°C is added to 0.40 kg of water at 20.0°C
(a) If the final temperature of the mixture is 26.°C, what is the specific heat of the metal? (b) If the water container has a significant heat capacity, will this increase or decrease the metal specific heat determined in part "a"given the same data?
A certain heat engine extracts 1.30 kJ of heat from a hot temperature reservoir and discharges 0.70 kJ of heat to a cold temperature reservoir. What is the efficiency of this engine?
A) 54% B) 86% C) 46% D) 13% E) 27%