An Inventor Develops a Stationary Cycling Device by Which an Individual,while

question 22

Multiple Choice

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 water (enough for 1 cup of coffee) is to be heated in 10 min from 20 $\degree$ C to 95 $\degree$ C? (1 cal = 4.186 J,the specific heat of water is 4 186 J/kg* $\degree$ C)

• A)9 400 W
• B)590 W
• C)160 W
• D)31 W

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