A dime is 1.8 cm in diameter. At what distance from your eye would you have to hold a dime so that it has the same angular diameter as the full Moon?
a. 2 m
b. 2 cm
c. 2 km
d. 2 inches
e. 2 ft
a
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Standing waves can result from _____ waves
a. longitudinal b. transverse c. both longitudinal and transverse d. neither longitudinal nor transverse
A heat engine absorbs 2 500 J of heat from a hot reservoir and expels 1 000 J to a cold reservoir. When it is run in reverse, with the same reservoirs, the engine pumps 2 500 J of heat to the hot reservoir, requiring 1 500 J of work to do so. Find the ratio of the work done by the heat engine to the work done by the pump. Is the heat engine reversible?
a. 1.0 (no) b. 1.0 (yes) c. 1.5 (yes) d. 1.5 (no) e. 2.5 (no)
State and describe the three phases of matter
What will be an ideal response?
Alpha decay occurs in some radioactive nuclides with A > 150. The probability of an alpha particle being emitted depends on the energy of the alpha particle. Why is this so?