The correct answer is **42 m ^{2}**.

The solution is represented by the formula (flux) = (power)/(area), or (area) = (power)/(flux).

Thus, 3,200 W divided by 77 W/m^{2} = the answer.

**Question 7.**

Now consider a compact car. Its average power requirement, while operating, is 18,000 W. How much collecting area is needed to provide this power?

Can this fit on a compact car?

(Note that this is the average power requirement. At times, power requirements can exceed 70,000 W, like when the car is accelerating or going uphill.)

Click **here** to check your answers and continue...

© 2001-2002, 2005 by Wm. Robert Johnston.

Last modified 11 January 2005.

Return to Home. Return to Environmental Topics. Return to Solar power worksheet introduction.