A certain electric motor produced `16kJ` of energy each second as mechanical work and lost `3kJ` as heat to the surroundings. What is the change in the internal energy of the motor and its power supply each second?
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
Energy is lost form the system as work, thus `W` is negative.
`:. W =- 16kJ`
Enegry is lost as heat, so `q =- 3kJ`
Therefore, by the first law of thermodnamics,
`DeltaU = q +w =- 3 – 16 – 19kJ`