A heat engine operating between 40°C and 380°C has an efficiency 60% of that of a Carnot engine operating between the same temperatures. If the engine absorbs heat at a rate of 60 kW, at what rate does it exhaust heat?
What will be an ideal response?
41. kW
You might also like to view...
Two horizontal curves on a bobsled run are banked at the same angle, but one has twice the radius of the other. The safe speed (for which no friction is needed to stay on the run) for the smaller radius curve is v
What is the safe speed on the larger-radius curve? A) v / B) 2v C) v D) v/2
Suppose we hold a sample of helium gas at a constant temperature while we slowly compress it in a cylinder until its volume has decreased by a factor of 4. During this process, the gas’s entropy
A. increases. B. decreases. C. remains the same. D. Does something else (specify).
A resistor is connected to an ideal ac power supply. (a) The phase angle between the current and voltage is
A) 0 B) ?/2 radians. C) -?/2 radians. D) ? radians. E) 3?/4 radians. (b) The current in the resistor A) leads the voltage across the resistor by 90°. B) lags the voltage across the resistor by 90°. C) is in phase with the voltage across the resistor. D) the voltage across the resistor by 45°. E) lags the voltage across the resistor by 45°. (c) How does the average power dissipated in the resistor change as the frequency in the ac power supply decreases? A) It decreases. B) It increases. C) It does not change. D) It increases or decreases depending on the sign of the phase angle. What will be an ideal response?
Rain that freezes upon striking a cold surface gives rise to a(n) ______________ storm
Fill in the blank(s) with correct word