Vs - velocity on beginning
ve - velocity on ending. You've got:

So he needed 4 second.
<span>the number of protons and neutrons. hope this helps (:
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The force between charges is proportional to the product of
the two charges. If just one of them is quadrupled, then their
product is also quadrupled, and so is the force between them.
The same identical argument applies to the gravitational force
between masses.
Ranking Earthquake Intensity
Magnitude Average number per year Modified Mercalli Intensity
2.0 – 2.9 >1 million I
3.0 – 3.9 about 100,000 II – III
4.0 – 4.9 about 10,000 IV – V
5.0 – 5.9 about 1,000 VI – VII
Explanation:
hope it helps
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The Earth itself is a source of terrestrial radiation. Radioactive materials including uranium, thorium, and radium exist naturally in soil and rock. Essentially all air contains radon<span> , which is responsible for most of the dose that Americans receive each year from natural background sources.</span>