Assume the woman in the figure uses her prism to look at a spectrum of light coming from the object(s) shown. In which case will she see a continuous rainbow of thermal radiation?
A) Case 1
B) Case 2
C) Case 3
D) Case 4
A) Case 1
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The efficiency of a Carnot engine would be increased if
A. the high and low temperatures were both lowered by 100°C. B. the high and low temperatures were both raised by 100°C. C. the low temperature were raised by 100°C. D. the high temperature were lowered by 100°C.
Which of the following is fundamentally different from the others?
A) sound waves B) X-rays C) gamma rays D) light waves E) radio waves
The coefficient of performance (COP) of a heat pump is defined as the ratio of
A) the heat delivered to the inside to the heat taken from the outside. B) the heat taken from the outside to the heat delivered to the inside. C) the heat delivered to the inside to the work done to move the heat. D) the heat taken from the outside to the work done to move the heat. E) the difference between the heat taken from the outside from the heat delivered to the inside to the work done to move the heat.
You are in an airplane, traveling relative to the ground at 500 km/hr. You throw a baseball toward the front of the plane at a speed of 50 km/hr. How fast would someone on the ground say the baseball is moving?
A) 550 km/hr B) 50 km/hr C) 500 km/hr D) 450 km/hr.