The answer to the previous question is A, a hot water tank for use with a solar collector. The heated liquid from solar collectors passes through the coils to heat the water inside the tank.
Next question: An inverter like this one is used for:
A. converting direct current from a wind turbine or solar panels to alternating current.
B. converting alternating current from a wind turbine or solar panels to direct current.
Answer and new question on next page.
March 16, 2009 4:00 AM PDT
Photo by: Martin LaMonica/CNET
| Caption by: Martin LaMonica
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