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The simplest way to explain how a vacuum cleaner can suck up debris is to think of it like a straw. When you take a sip of drink through a straw, the action of sucking creates a negative air pressure...
Electric motors are one of the most fascinating inventions of the twentieth century. They leverage the power of induction to create motion from electricity. Electromagnetism is one of the most important forces that we know of in physics. You may...
Modern aircraft and cars use hydraulics to operate brakes and steering mechanisms. Robotic systems in factories and large earth-moving equipment at construction sites also use hydraulics. The fluid is almost always an oil of some sort. Thin oil is better...
Early peoples learned how to use flowing water to do work. Water was used to power water mills and to provide irrigation for farming. Later, people were able to use liquids to do even more after scientists learned that all...
An elevator or lift is a vertical transport vehicle that efficiently moves people or goods between floors of a building. They are generally powered by electric motors that either drive traction cables and counterweight systems, or pump hydraulic fluid to...
