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Masja [62]
3 years ago
9

Which groups of organisms became extinct during the Paleozoic Era

Physics
1 answer:
guapka [62]3 years ago
4 0
Dinosaurs but I need the whole groups yo tell you ;)
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A train starts from rest and accelerates uniformly, until it has traveled 3.7 km and acquired a velocity of 26 m/s. What is the
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We have:
s=3,7km (3700m)
u=0
v=26m/s
a=
t=
We look up for a formula to solve for a:
v²=u²+2as u²=0 so
v²=2as
(26m/s)²=2a3700m
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Explanation:

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Hey there, 

Question: "<span>What is the half life of Strontium-90? Explain your answer"

Answer: </span>28.8 years / <span>Strontium-90 has 52 neutrons and 38 protons. </span>
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