18. (i) State the law of conservation of energy (ii) Define mechanical energy (iii) Calculate the energy in kWh consumed in 10 hours by four devices of power 500 W each.
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the law of conservation of energy states that energy can neither be created nor destroyed but can be changed from one form of energy to another form.Example the electricity enters the bulb and produces light and heat energy.
mechanical energy is the sum of potential and Kinetic energy.
mechanical energy is the sum of potential and Kinetic energy.
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the law of conservation of energy states that energy can neither be created nor destroyed but can be changed from one form of energy to another form.Example the electricity enters the bulb and produces light and heat energy.
mechanical energy is the sum of potential and Kinetic energy.
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