What Is a Meteorite?
What Is a Meteorite? Meteorites begin as bodies of matter traveling at great speed through space. In the solar system there are numberless such bodies, usually chunks...
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What’s the Difference Between Disc and Drum Brakes?
What’s the Difference Between Disc and Drum Brakes? A car in motion has a lot of kinetic energy, which is energy of motion. To stop a car, the brakes have to get...
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How Does a Microwave Oven Work?
How Does a Microwave Oven Work? Conventional ovens cook food by heating air, which, in turn, heats the food. Microwave cooking is direct. It cooks by creating heat...
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What Causes Volcanoes?
What Causes Volcanoes? Volcanoes form when pressures within the earth force melted rock and gases upward through cracks in the surface. The earth’s crust is made...
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How Do Microwave Ovens Work?
How Do Microwave Ovens Work? In a microwave oven, you can cook a hamburger in only four minutes. Conventional ovens cook food by heating air which, in turn, heats the...
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