SOLUTION: a 2 w of power per square inch.150 km W of pwer to function. to the nearest square meter, how many square meters are required?

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Question 215548: a 2 w of power per square inch.150 km W of pwer to function. to the nearest square meter, how many square meters are required?
Answer by drj(1380) About Me  (Show Source):
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A 2 w of power per square inch. 150 kW of power to function. To the nearest square meter, how many square meters are required?

Step 1. Let I+=+P%2FA=2+W%2Finch%5E2 and P+=150+%2A10%5E3 W where P is the power and A is the area.

Step 2. Then A=P%2FI

Step 3. Convert units of A in square inch to square meters where 2.54 cm = 1 inch = 0.0254 m. Then, 1 inch * 1 inch = 0.0254+%2A+0.0254+=+6.451%2A10%5E%28-4%29

Step 4. Then A=P%2FI=150%2A10%5E3%2F%282%2A6.451%2A10%5E%28-4%29%29=1.163%2A10%5E8 square meters.

Step 5. ANSWER is 1.163%2A10%5E8 square meters.

I hope the above steps were helpful.

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Good luck in your studies!

Respectfully,
Dr J