A battery-powered flashlight receives
chemical energy as input.
Here's how it works:
- The battery inside the flashlight stores chemical energy.
- When you turn on the flashlight, a chemical reaction occurs inside the battery, which converts that chemical energy into electrical energy.
- This electrical energy flows to the light bulb or LED inside the flashlight, where it is converted into light energy (and a small amount of heat energy).
So, the input energy is chemical energy from the battery, and the output is light and heat energy.