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Levart [38]
2 years ago
8

I will give brainliest to person who answers correctly

Physics
1 answer:
Mamont248 [21]2 years ago
6 0
I think the first one
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Henry slides across an icy pond. The coefficient of kinetic friction betweenhis shoes and the ice is 0.09. If his mass is 115 kg
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101 N

Explanation:

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Iodine 131 half life is 8.0 days. Ten percent of the original sample o his isotope remains after (a) 22.7 days (b) 24.9 days (c)
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Answer:

option (c) is correct

Explanation:

Half life of a substance is the time in which the element becomes half of is initial value.

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N = 10% of No

N = 0.1 No

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The relation between the decay constant and the half life is given by

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Us the equation of radioactivity

N=N_{0}e^{-\lambda t}

0.1N_{0}=N_{0}e^{-0.08664 t}

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