In a small dam, water flows at a rate of 2500 kg/s and falls 30 m....

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Question

In a small dam, water flows at a rate of 2500 kg/s and falls 30 m....

In a small dam, water flows at a rate of 2500 kg/s and falls 30 m. After calculating the power wasted by the waterfall, how many 75 W light bulbs can be lit by this power?
A)7350 bulbs
B)75000 bulbs
C)9800 bulbs
D)2940 bulbs

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Answer 1

Answer #1

Solution:

Power generated by the system = Mgh = 2500 x 9.8 x 30 watts

Now power of 1 bulb 75 watt

So number of bulbs illuminated = 2500 x 9.8 x 30 / 75 = 9800

Option C

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Answer 2

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