Carnot Engine: A heat engine having the maximum possible efficiency has an efficiency of 35.0% when operating between two heat reservoirs. If the temperature of the hot reservoir is 700 K, what is the temperature of the cold reservoir?
A. 200 K
B. 245 K
C. 350 K
D. 455 K
E. 600 K
Answer: D
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Answer the following statement(s) true (T) or false (F)
1. The angular momentum of a particle can be nonzero even if it moves in a straight line. 2. The angular momentum (around a rotating rigid object’s center of mass) of an arbitrary particle in that object points directly along the object’s rotation axis.
The surface tension of soapy water is 0.0250 N/m. What is the height of the water in a capillary tube of diameter 2.00 mm?
A. 5.10 mm B. 4.77 mm C. 4.21 mm D. 3.98 mm E. 3.66 mm
Lead has a shear modulus of 
and a density of 
What is the velocity of shear waves in lead?
A. 691 m/s B. 621 m/s C. 575 m/s D. 521 m/s E. 487 m/s
A bolt of lightning strikes the ground 200 m from a 100-turn coil oriented vertically and with the plane of the coil pointing toward the lightning strike. The radius of the coil is 0.800 m and the current in the lightning bolt falls from 6.02 × 106 A to zero in 10.5 ?s. What is the voltage induced in the coil over this time period? [A question for future electrical engineers: is there any way to get lightning to strike repeatedly at the same point?]
?
What will be an ideal response?