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Understanding Electricity: How Electricity Works

Electricity has dramatically changed lifestyles in much of the world, but how does it work? In segments that cover television technology, the harnessing of electricity and electromagnetic power, students examine electricity.


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Electricity From Spinach

Electricity From Spinach (1:31)

Watch this video about electricity from spinach on HowStuffWorks. MIT researchers have created a spinach-powered solar battery, harnessing the ability of plants to convert sunlight into electricity. Learn how to generate electricity from spinach in... More »

Invention Nation: Solar Panels

Invention Nation: Solar Panels (1:22)

Take a closer look at the technology used to build solar panels. Learn more about solar cells in this video.

Solar Farm

Solar Farm (1:40)

From the archives of Discovery: Solar energy is mass-produced on a large farm of solar panels. Learn more about solar power, solar farms and alternative energy in this video.

Understanding Electricity: How Electricity Works

Understanding Electricity: How Electricity Works (55:59)

Electricity has dramatically changed lifestyles in much of the world, but how does it work? In segments that cover television technology, the harnessing of electricity and electromagnetic power, students examine electricity.

Energy: Nuclear Energy

Energy: Nuclear Energy (1:49)

Nuclear energy used to produce electricity does not release pollutants into the environment unless there is an accident, at which point very harmful radioactive materials are released.

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Understanding Magnetism: All About Magnetism

Understanding Magnetism: All About Magnetism (50:00)

In this video, find out how magnetic forces were first discovered and how magnetism affects humans and other animals. Explore the role of magnetism in computers, audio recording, medicine and travel.

Understanding Electricity: How Electricity Works

Understanding Electricity: How Electricity Works (55:59)

Electricity has dramatically changed lifestyles in much of the world, but how does it work? In segments that cover television technology, the harnessing of electricity and electromagnetic power, students examine electricity.

Energy Converters: A Review

Energy Converters: A Review (1:47)

We could not exercise or live if we did not convert energy. All organisms, whether producers or consumers, need to absorb and convert energy. That energy is noticeable only when it is converted from one form to another.

Solar Energy in the Biosphere: A Review

Solar Energy in the Biosphere: A Review (1:09)

The flow of energy through the biosphere sustains life on Earth, and in this way the planet is similar to a spaceship traveling through space. Like any other crew of astronauts, we must take care of our life support systems.

Power Up: A Review

Power Up: A Review (2:05)

This clip reviews the concepts of energy use and alternative sources of energy.

Power Up: Everyday Energy Conservation

Power Up: Everyday Energy Conservation (3:16)

Ways of reducing our dependence on fossil fuels include turning off lights when not needed, using fans rather than air conditioning, turning down thermostats in winter, insulating homes better and not using cars for short trips.

Power Up: An Overview of Earth and Energy

Power Up: An Overview of Earth and Energy (1:54)

Our use of energy makes our many modern conveniences possible, but it has caused smog and acid rain. Ultimately, it may change Earth’s climate.

Work and the Simple Machine: Work and Energy Quiz

Work and the Simple Machine: Work and Energy Quiz (6:37)

Find out how much you've learned about work and energy by taking this video quiz.

Work and the Simple Machine: Power Defined

Work and the Simple Machine: Power Defined (1:44)

Power is the amount of work performed divided by the time period required to do the work. The unit of power in the English system is horsepower (hp).

Work and the Simple Machine: Work Defined

Work and the Simple Machine: Work Defined (2:18)

Work is accomplished only when a force is used to move an object a distance. The English system uses foot-pounds to measure work; the metric system uses Newton-meters to measure work.