A simple way of air conditioning that you can use there. where electricity is unavailable, it consists in hanging strips of wet cloth in the room water. The evaporation of the water cools the air. Calculate the amount of heat needed for evaporation of 1.0 kg of water at the temperature: a) 25 ° C, b) 100 ° C

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.