Q51 of 141 Page 14

What is the ultimate source of almost all our sources of energy?

The energy that the earth receives from the sun, in the form of heat and light, is the ultimate source of almost all our source of energy.

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49 Explain why is it difficult to burn a wet piece of wood. 50 Pouring dry sand over fire helps to contain it. Explain why? 52 Define net energy or useful energy with an example. 53 How does technology help in the transformation of energy?