If a car engine burns an equivalent of 20,000 joules of energy and attains a kinetic energy of 5,000 J, how much energy is dissipated in the form of heat?

Respuesta :

Overall energy is conserved so the energy generated must equal to the kinetic energy and thermal energy. 
20,000 = 5,000 + T.E
Thermal energy = 15,000 J
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