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Your life in 400 free calculators Physics is what drives the world around us: it's the language that explains the most basic laws of nature. Why do things fall when we drop them? How come ice cubes float in fresh water? How much power does a rocket need to go into space? Behind each such question, there's numerical data and a formula that uses it. At CalcTool, we aim to provide you with the answer without the need to remember the equations, no matter if you're checking your homework or satisfying your natural curiosity.