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The lever 0

Structure and the importance of the levers

The levers are the most common simple machines that help man to perform heavy tasks easily. They were first described in 260 B.C, The liver is affected by an effort force and a resistance...

The light bulb structure 0

Uses of light bulbs and their structure

The electric lamps Electric lamps are tools that convert electric energy into light energy by passing electricity through them, There are different types of electric lamps, but the most popular of these lamps are...