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kozerog [31]
3 years ago
11

Which of the following does not affect the apparent brightness of a star.

Physics
2 answers:
Tamiku [17]3 years ago
4 0
I would say that it is a how old the star is
Zigmanuir [339]3 years ago
3 0
A) how old it is :)))
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Why was Thompson's Plum pudding model a significant departure from previous models?
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5 0
3 years ago
The half-life of plutonium 239 is 24,200 years. Assume that the decay rate is proportional to the amount. Determine the amount o
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time taken is equal to 14,156 years

Explanation:

we know,

Y=Ae^{-kt}

at t = 0

Y(0) = A

given that half life of plutonium 239 = 24,200

\dfrac{A}{2}=Ae^{-kt}\\0.5=e^{-kt}\\k\times 24200 = ln(2)\\k = \dfrac{ ln(2)}{24200}

Y=Ae^{-kt}

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hence time taken is equal to 14,156 years

5 0
3 years ago
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