A certain automobile engine takes in 4.00 kJ of energy and performs 1.10 kJ of mechanical work in each cycle. (a) Calculate the engine's efficiency. (b) How much thermal energy is "wasted" in each cycle?
What will be an ideal response?
(a) 27.5% (b) 2.90 kJ
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Consider the experimental evidence we have discussed in the past few chapters. Classify the following experimental results according to the following scheme: For the quantons in question, the results:
A. Are consistent with a pure wave model. B. Are consistent with a pure particle model. C. Are consistent with either model (the results do not distinguish between models). D. Cannot be explained by either model alone.
Suppose you see a photo showing Jupiter half in sunlight and half in shadow (that is, a first quarter Jupiter). This photo might have been taken by
A) a spacecraft orbiting Jupiter. B) the Hubble Space Telescope (which orbits Earth). C) the Keck telescope on Mauna Kea, Hawaii. D) the Arecibo radio telescope in Puerto Rico.
An airplane flying with a constant speed flies from a warm air mass into a cold air mass. The Mach number (the ratio of the speed of the airplane to the speed of sound) will:
a. increase. c. stay the same. b. decrease. d. become unstable.
A hologram like the one shown here cannot be fully appreciated from pictures shown in a book. Why is this?
a. The colors are brighter in a hologram. b. Textbook printing methods cannot reproduce any picture generated by laser light. c. A hologram appears as a three-dimensional image to the viewer, but not by viewing the flat page of a book. d. Information from each point in the scene is recorded in all points of the hologram.