- (B) The efficiency rating is calculated by comparing the amount of energy
input to the amount of energy output (work accomplished). Efficiency is
usually given as a percentage and can be computed with the following
formula: = efficiency rating (in decimal) Useful output =
10.0 joules × 0.10
Useful output = 1 joule of light and therefore 9 joules of heat energy
(wasted) 57. (B) The most probable explanation for the increase in the
rabbit population after 1950 was that the coyote population declined
drastically. The relationship indicated by the graph is one of predator-
prey. The coyotes prey upon rabbits, keeping the population in check.
marvins-underground-k-12
(Marvins-Underground-K-12)
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