An inventor develops a stationary cycling device by which an individual, while pedaling, can convert all of the energy expended into heat for warming water. What minimum power must be generated if 210 g water (enough for 1 cup of coffee) is to be heated in 14.0 min from 26.0°C to 84.0°C? (1 cal = 4.186 J, the specific heat of water is 4 186 J/kg/°C)
a. 3 640 W
b. 289 W
c. 60.7 W
d. 850 W
e. 42.5 W
c
Physics & Space Science
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