WHAT'S INSIDE: PHYSICAL SCIENCE

Physical science is the study of the physical world around you. Learn about everything from electricity to magnetism in this section.
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Capacitor, a device whose principal electric property is capacitance, the ability to store an electric charge. Learn about the basics of how capacitors work and the different types of capacitors.

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In this series from the Science Channel, discover what incredible things can happen within a day, an hour or an attosecond.

Biting on aluminum foil can be painful. Why?

Biting on aluminum foil can be painful -- basically, when you bite on foil, you build a battery in your mouth. Ouch!

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