Question

how is heat produced?​

Answer 1

Explanation:

Heat is produced by mechanical and electrical machines, and any time one thing rubs against something else. When warmer things are put with cooler ones, the warm ones lose heat and the cool ones gain it until they are all at the same temperature. A warmer object can warm a cooler one by contact or at a distance.

Answer 2

Heat is produced by mechanical and electrical machines, and any time one thing rubs against something else. When warmer things are put with cooler ones, the warm ones lose heat and the cool ones gain it until they are all at the same temperature. A warmer object can warm a cooler one by contact or at a distance.