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Name a device that does the following energy transformation: Heat → Mechanical energy, Chemical energy →...

Name a device that does the following energy transformation: Heat → Mechanical energy, Chemical energy → Electrical energy, Solar energy → Mechanical energy, Electrical energy → Light, Electrical energy → Heat.

What is the ideal mechanical advantage in raising a 50 kg mass to a height of 5 m using a 20◦ inclined plane?

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