The human eye can just detect green light of wavelength 500. nm, which arrives at the retina at the rate of 2 × W. How many photons arrive each second?
What will be an ideal response?
5.
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An engine manufacturer makes the claim that the engine they have developed will, on each cycle, take 100 J of heat out of boiling water at 100°C, do mechanical work of 80 J, and exhaust 20 J of heat at 10°C
What, if anything, is wrong with this claim? A) The heat exhausted must always be greater than the work done according to the second law of thermodynamics. B) This engine violates the first law of thermodynamics because 100 J + 20 J ? 80 J. C) An engine would operate by taking in heat at the lower temperature and exhausting heat at the higher temperature. D) The efficiency of this engine is greater than the ideal Carnot cycle efficiency. E) There is nothing wrong with this claim because 100 J = 20 J + 80 J.
In the production of sediment from fresh rock, which usually occurs first, erosion or weathering?
What will be an ideal response?
The dome of water associated with a hurricane making landfall is called a(n) ______________
Fill in the blank(s) with correct word
The total electromagnetic power emitted by the Sun is 3.8 ×1026 W. What is the radiation pressure near the orbit of Mercury, which has an orbital radius of 5.8 × 1010 m?
A) 3 × 10-5 N/m2 B) 3 × 10-7 N/m2 C) 3 × 10-8 N/m2 D) 3 × 10-4 N/m2 E) 3 × 10-6 N/m2