A car engine uses the combustion of fuel to move a system of gears that move its wheels. Not all of the fuel's energy is transferred to the wheels. Which two options describe what happens to the rest of the energy? A. Some energy is lost because it is transformed into chemical energy. B. Some energy is lost because it is transformed into potential energy. C. Some energy is lost because it is absorbed by the driver. D. Some energy is lost because of the friction between the gears. E. Some energy is lost because it is transformed into thermal energy.

Question

A car engine uses the combustion of fuel to move a system of gears that move its wheels. Not all of the fuel's energy is transferred to the wheels. Which two options describe what happens to the rest of the energy? A. Some energy is lost because it is transformed into chemical energy. B. Some energy is lost because it is transformed into potential energy. C. Some energy is lost because it is absorbed by the driver. D. Some energy is lost because of the friction between the gears. E. Some energy is lost because it is transformed into thermal energy.

Answer 1

The correct answers are options D and E. Friction between gears (D) and the transformation of energy into thermal energy (E) are both ways in which energy is lost in a car engine. Friction is a force that opposes motion and converts kinetic energy into heat, while the inefficiencies in the combustion process and other engine operations also produce heat that is not used for moving the vehicle. Options A, B, and C do not accurately describe the typical energy losses in a car engine.

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