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Pie
3 years ago
6

HELP PLS BRAINLEST

Chemistry
2 answers:
Maurinko [17]3 years ago
8 0
First of all, a light-year is the distance light travels in one year. The star Alpha Centauri is about 4 light-years away, so light from Alpha Centauri takes 4 years to get to the Earth
Aleks04 [339]3 years ago
4 0
It would take 4 years to reach earth
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Explanation:

hope this helps you :)

4 0
3 years ago
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You strat off with 400 grams of your substance. By day 14, half has dcayed and you only have 200 grams left. By day 28, there are 100 grams of the substance. On day 42, there are 50 grams left. Finally, on day 56, the substance has been through four half-lives and 25 grams remain.

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2 years ago
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liberstina [14]

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