Question 13 (1 point)
Betsy depends on her electric alarm clock every morning to get up in time for school. What energy transformation happens in Betsy's alarm clock to wake her up in the morning?
a
chemical energy is converted to kinetic energy
b
electrical energy is converted to sound energy
c
sound energy is converted to electrical energy
d
electrical energy is converted to thermal energy
b
electrical energy is converted to sound energy
The correct answer is (b) electrical energy is converted to sound energy.
In order to determine the correct answer, we need to understand the different types of energy conversions happening in Betsy's alarm clock.
An alarm clock typically consists of electrical components, such as a power source and a circuit, which enable it to function. The energy transformation happens in the following way:
1. Electrical energy: Betsy's alarm clock is most likely powered by electricity from a wall outlet or a battery. This electrical energy is stored in the power source of the alarm clock.
2. Sound energy: When the alarm time is reached, the electrical energy is converted into sound energy. This conversion occurs through the speaker or buzzer mechanism in the alarm clock. The electrical energy from the power source powers this mechanism, causing it to vibrate and produce sound waves.
Since the electrical energy from the power source is converted into sound energy to wake Betsy up, the correct answer is (b) electrical energy is converted to sound energy.