Question

question 4 of 25
storm radios are designed with backup batteries so that they can be used even in the case of a power outage. which sequence best illustrates the energy conversions during a power outage?
a. electrical energy is converted into mechanical energy of the speakers, which is then transferred into sound wave energy.
b. chemical energy in the battery is transferred to kinetic energy of the air molecules, which is then transferred into sound.
c. electrical energy is converted into chemical potential energy, which is then transferred into the energy of the sound waves.
d. chemical energy in the battery is transferred to electrical energy, which is then transferred into the energy of the vibrating air molecules in the sound waves.

Explanation:

During a power outage, backup batteries are used. Batteries store chemical energy. When in use, this chemical energy is converted to electrical energy to power the radio. The electrical energy then causes the speakers to vibrate, creating vibrations in air - molecules which is the energy of sound waves.

Answer:

D. Chemical energy in the battery is transferred to electrical energy, which is then transferred into the energy of the vibrating air molecules in the sound waves.