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

question 4

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.How much mechanical energy is required to increase the temperature of 200 g of water (enough for 1 cup of coffee) from 18°C to 94°C? (1 cal = 4.186 J,the specific heat of water is 4 186 J/kg⋅°C) ​

• A)6.4E+4 J
• B)3.2E+4 J
• C)1.6E+4 J
• D)1.0E+3 J
• E)​1.5E+1 J

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