Work = (500N)(15m)=7500J Power= (7500J)/(20s) =375 W
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The answer is d that might help you
Via the half-life equation:

Where the time elapse is 11,460 year and the half-life is 5,730 years.

Therefore after 11,460 years the amount of carbon-14 is one fourth (1/4) of the original amount.
A stream’s discharge rate if it has a width of 10 meters, a depth of 2 meters, and a velocity of 2 meters per second will be 40
/sec .
Discharge rate = velocity * area
= velocity * depth * width
= 2 * 2 * 10 = 40
/sec
A stream’s discharge rate if it has a width of 10 meters, a depth of 2 meters, and a velocity of 2 meters per second will be 40
/sec .
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Answer:
1115560000 J
Explanation:
1/2 * 80,000 * 167^2 m/s = 1115560000 J