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 300 g of water (enough for 1 cup of coffee) is to be heated in 10 min from 30$\degree$C to 90$\degree$C? (1 cal = 4.186 J, the specific heat of water is 4 186 J/kg ·$\degree$C)
A) 9400 W
B) 590 W
C) 160 W
D) 130 W

Question

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The Answer of 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 300 g of water (enough for 1 cup of coffee) is to be heated in 10 min from 30$\degree$C to 90$\degree$C? (1 cal = 4.186 J, the specific heat of water is 4 186 J/kg ·$\degree$C)
A) 9400 W
B) 590 W
C) 160 W
D) 130 W

An Inventor Develops a Stationary Cycling Device by Which an Individual