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iris [78.8K]
3 years ago
12

Which of Newton’s laws, when combined algebraically with his law of universal gravitation, can be used to calculate Earth’s mass

?
A) first
B) second
C) third
Physics
1 answer:
andriy [413]3 years ago
4 0

B) second law of motion which states that F=ma

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An element consists of two isotopes. The abundance of one isotope is 60.40% and its atomic mass is 68.9257 u. The atomic mass of
amm1812

Answer:

69.7173 u

Explanation:

The abundance of the first isotope is =60.40%

So the abundance of the second isotope =100%-60.40%=39.6%

Atomic mass of first isotope = 68.9257

So the average atomic mass of the first isotope =68.9257×0.6040=41.6311 u

Atomic mass of the second isotope =70.9249 u

So average atomic mass of second isotope =70.9249×0.396=28.086

Now the average atomic mass =41.6311+28.086=69.7173 u

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If the price of gasoline at a particular station in Europe is 5 euros per liter. An American student in Europe is allowed to use
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