Question

which of the following examples describes a transformation of electrical energy to sound energy? a ball bounces and makes a loud noise. batteries power a cd player. a car rolls down a hill. a light bulb is turned on.

Explanation:

1. Analyze option A: A ball bouncing and making noise is a transformation of mechanical energy (kinetic and potential) to sound energy, not electrical to sound.
2. Analyze option B: Batteries store chemical - energy which is converted to electrical energy to power a CD - player. The CD - player then converts the electrical energy into sound energy to play music. This is the correct energy transformation.
3. Analyze option C: A car rolling down a hill is a transformation of gravitational potential energy to kinetic energy, not related to electrical and sound energy transformation.
4. Analyze option D: A light - bulb turned on is a transformation of electrical energy to light and heat energy, not sound energy.

Answer:

B. Batteries power a CD player.