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azamat
3 years ago
7

The half-life of hydrogen-3 (tritium) is approximately 12 years. In how many years will half of a 20-gram sample decay by beta r

adiation to helium-3?
Physics
2 answers:
Yuliya22 [10]3 years ago
4 0
The easiest way to work this out is to think of the amount of decay as a percentage. so in 12 years its down to 50% another 12 years its down to 25%, another 12 years its 11.5 %. 

<span>for a 20 gram sample to decay by half will still be 12 years no matter how many grams one has.</span>
kherson [118]3 years ago
4 0

Answer: 12 years

Explanation:

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RideAnS [48]

Here's how I would do it:

How far does he have to go to catch the bug ?  <u>23.8 meters</u>

How soon does he want to get there ?  <u>1.8 seconds</u>

What speed does he need ?  (23.8 m) / (1.8 sec) = <u>13.222 m/sec</u>

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How much does he need to increase it ?  (13.222 - 3.7) =  <em>9.5 m/s</em> faster


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4 years ago
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yulyashka [42]

Answer:

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3 years ago
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Mrac [35]

Acceleration = (change in speed) / (time for the change)

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4 years ago
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Answer:

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