If the velocity is decreased by half, then Kinetic energy will reduced to it's 4 times,
= 1.9 * 10³ / 4
= 4.75 * 10²
In short, Your Answer would be Option B
Hope this helps!
I believe it's the the third one. :)
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Answer:
c. by allowing people to easily travel to distant countries
The amount of exhaust heat discharged per hour from the plant which produces electric energy at the rate of 1. 5 gw, is 9.36×10¹⁹ J/h.
<h3>How to calculate the heat discharged per hour?</h3>
The heat is discharged per hour is equal to the different of total power and actual power.
The plant produces electric energy at the rate of 1. 5 gw. Let assume the efficiency of this power plant is 64% between the temperature of 660 degree C to 330 degree Celsius.
Thus, the maximum efficiency is,

The total power is,

Thus, the heat discharged per hour is,

Multiply the value with 3600 to convert it in s/h,

Thus, the amount of exhaust heat discharged per hour from the plant which produces electric energy at the rate of 1. 5 gw, is 9.36×10¹⁹ J/h.
Learn more about the heat discharged per hour here;
brainly.com/question/19666326
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