Multiple Choice
Solar space heating units tend to be less expensive than solar water heating units because
A) solar heating units can be passive and water heating units must be active.
B) it takes longer to heat up air than water.
C) because of its low density,it is usually cheaper to move air than water.
D) solar space heating units can only be used near the equator.
Correct Answer:
Verified
Correct Answer:
Verified
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