Homework Help: Physical Science

Posted by Sue Ann on Tuesday, May 4, 2010 at 2:19pm.

What is the apparent contradiction in the statement that "solar energy is free" with the fact that solar cells are too expensive to use as an energy source.

Physical Science - DrBob222, Tuesday, May 4, 2010 at 2:33pm
Solar energy IS free. It's the conversion to a useful form (electrical, heat, etc) that is expensive.

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