- Question: Radio is electromagnetic.
- Answer: Radio uses waves of energy in the electromagnetic spectrum, which includes light, heat, and X-rays.
- Question: Hooke’s law has to do with elastic materials.
- Answer: Hooke’s law of elasticity describes how the deformation of an object is translated into force. For example, when a rubber band is bent, the tension yields energy.
- Question: Energy can be transmitted wirelessly.
- Answer: There are many ways to transfer energy wirelessly. One is through lasers, another through radio waves, and still another through magnetic resonance.
- Question: Radar is a system that uses waves of energy to sense objects.
- Answer: Radar is a system that uses waves of energy to sense objects. It can find a faraway object and tell how fast it is moving. It is useful because it can sense objects even at night and through clouds.
- Question: Microbes can provide energy.
- Answer: Tiny creatures called microbes can eat newspaper, wood, leaves, plants, and other materials and convert them into sugars, which can in turn be made into energy.
- Question: In the human body, food energy is stored in the hair.
- Answer: In the human body, food energy is stored in fat tissue.
