?Which describes a strength and a weakness of an evacuated tube solar collector compared with a flat-plate solar collector?
A. ?The evacuated tube collector sheds snow better, but requires more mounting space.
B. ?The evacuated tube collector requires long lasting seals, but is poor at shedding wet snow.
C. ?The evacuated tube collector is resistant to hailstones, but requires more mounting space.
D. ?The evacuated tube collector retains heat better at high temperatures, but requires more mounting space.
Answer: D
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? Identify and state the historical significance of Ignatius Donnelley.
What will be an ideal response?
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