The "hot shot" thermodynamic engine operating between 40°C and 380°C has an efficiency that is 60% of that of an ideal Carnot engine operating between the same temperatures
If the "hot shot" engine absorbs energy at a rate of 60 kW, at what rate does it exhaust energy? A) 36 kW
B) 41 kW
C) 57 kW
D) 60 kW
B
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Describe the motion of an object that possesses kinetic energy yet undergoes no net displacement.
a) The object must be rolling b) The object must be sliding c) The object must be at rest d) The object must be spinning e) The object must be falling
How many nodes does a standing wave in a string have at the frequency of the sixth harmonic?
a. 12 b. 6 c. 3 d. The answer is not given.
The figure shows a graph of the acceleration of a 125-g object as a function of the net force acting on it. What is the acceleration at points A and B?
What will be an ideal response?
The observation that materials expand in size with an increase in temperature can be applied to what proportion of existing substances?
a. 100% c. few b. most d. none