What evidence do scientists have that earth has been hit by large objects like asteroids in the past
1 answer:
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The centripetal force exerted on the automobile while rounding the curve is
<u>Explanation:</u>
given that
Objects moving around a circular track will experience centripetal force towards the center of the circular track.
Answer:
0.002
Explanation:
The half-life of the radioactive nucleus is related to its quantity, by the following equation:
<u>Where:</u>
<em>N(t): is the quantity of the radioactive nucleus at time t</em>
<em>N₀: is the initial quantity of the radioactive nucleus</em>
<em>t: is the time = 4.5x10⁹ years</em>
<em>t(1/2): is the half-life of the radioactive nucleus = 5x10⁸ years</em>
Therefore, the fraction of the radioactive element in the rock today is 0.002.
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