Question

each time energy is converted from one form to another, a percentage of that energy is lost as ____ or fails to be converted.
fuel
heat
combustion
water
carbon dioxide

Explanation:

According to the laws of thermodynamics, when energy is converted from one form to another, some energy is dissipated as heat due to inefficiencies in the conversion process. Heat is a common form of energy loss in such conversions, like in engines where mechanical - energy conversion from chemical energy in fuel has heat as a by - product.

Answer:

B. heat