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PHYSICS

JAMB 2005 - Question 9

Physics 2005 JAMB Past Questions - Question 9: The time it will take a certain radioactive material with a half-life of 50 days to reduce to 0f its original number is

Choose the correct answers from the options given.

The time it will take a certain radioactive material with a half-life of 50 days to reduce to 0f its original number is

A: 300 days.

B: . 150 days.

C: 200 days.

D: 250 days.

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Correct Answer

Explanation

Since 1/32, is the fraction left of any radioactive material after 5half lives, that is:
1/32= (1/2)5. Thus if a half life is 50 days, 5 half lives will be 50 x 5= 250 days