An irreversible engine operating between the temperatures of 550 K and 300 K extracts 1.20 kJ of thermal energy from the hot reservoir and produces 0.450 kJ of work. How much entropy is created in the process?
A) 0.32 J/K
B) 0.68 J/K
C) 0.44 J/K
D) 0.73 J/K
E) 0 J/K
A
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In the figure, a laser positioned on a ship is used to communicate with a small two-man research submarine resting on the bottom of a lake
The laser is positioned 12 m above the surface of the water, and it strikes the water 20 m from the side of the ship. The water is 76 m deep and has an index of refraction of 1.33. How far horizontally is the submarine from the side of the ship? A) 84.1 m B) 64.1 m C) 104 m D) 74.1 m E) 94.1 m
A blue shift for light indicates that the light source is moving
A) toward you. B) away from you. C) both of these D) neither of these
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The average intensity of the sunlight in Miami, Florida, is 1.04 kW/m2. For surfaces on which the light is all absorbed,
what is the average value of the radiation pressure due to this sunlight in Miami? (c = 3.00 × 108 m/s, ?0 = 4? × 10-7 T ? m/A, ?0 = 8.85 × 10-12 C2/N ? m2) A) 9.78 µPa B) 2.28 µPa C) 6.93 µPa D) 1.73 µPa E) 3.47 µPa