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How is coal a store of solar energy?

Answer 1

Coal is formed from the decay and later coalification of vegetative matter - plants. When these plants were alive they were utilizing solar energy via photosynthesis.

Photosynthesis when combined with water and nutrients provides the nutrients plants need to thrive. Once the plant dies, these organic compounds (with the contained energy from the sun) compress over long periods of time - called coalification.

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Answer 2

Vivian Ahern

Coal is a store of solar energy through the process of photosynthesis in plants that lived millions of years ago.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.