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3 years ago

14

Planets orbit the Sun, while the Moon and other satellites orbit the Earth. Such orbital motion is the result of _______ and eac

h satellite's forward inertia.

1 answer:

Lorico [155]3 years ago

8 0

Gravity ? that is possibly the answer

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3 years ago

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3 years ago

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3 years ago

What does WA mean in Friction?

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2 years ago

The half-life for the radioactive decay of U-238 is 4.5 billion years and is independent of initial concentration. How long will

Setler [38]

Answer:

Explanation:

Given

half life $(t_{\frac{1}{2})=4.5$ billion year

10 % to decay i.e. 90 % remaining

And $\ln (\frac{C}{C_0})=-kt$

where k= constant

t=time

and $k=\frac{\ln (2)}{t_{\frac{1}{2}}}=\frac{\ln (2)}{4.5}$

so $\frac{C}{C_0}=0.9$

$\ln (0.9)=-\frac{\ln (2)}{4.5}\times t$

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(b) $C_0=1.5\times 10^{18}$

t=13.8 billion year

$\ln (\frac{C}{C_0})=-0.15403\times 13.8$

$\ln (\frac{C}{C_0})=-2.125$

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3 years ago