I believe it's Mercury, because the only other option would be Pluto and it's not even considered a planet anymore
Hope this helps
Answer:
it means that velocity of a body rises by 9.8m/s each second if the air resistance is nrelated
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In fresh water sound waves travel at 1497m/s at 25 degrees, I'll assume that's the characteristics of the water.
If it's 0.01s then you need to divide the speed by 100 to get the, 14.97, however it gets there and back in that time so you need to halve it.
<u>7.485m</u>
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