5. The frequency of a radioactive wave is 4 x 10^3 sec-1. Calculate the time required for this wave to
travel a distance of 8 x 10^7km
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Answer:
It takes 20 seconds to reach 8*10^7
Explanation:
The frequency of radioactive wave travel 4*10^3 in 1 sec
Then,
8*10^7 =20 times of 4*10^3
That means its takes 20 times more time than 4*10^3
It 1 sec
Than 8*10^7 will take 20 sec
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