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The half life of a radioactive element M is 30 min. How many atoms of A will be left after 2 h if there is 64 atoms of M in the beginning? Options: A. 4 , B. 64, C. 0, D. Can't say.

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A 4
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Brain Trainer

Answer is A. 4
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it will be 8 . or D.
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Get mentored by science olympiad topper.

Yeah a.4 is correct its eqaul to 4 half life's.so 64/2^4 I.e 64/16 is equal to 4
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Math Magician

A
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Tutor

4
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M.SC(MATHS),M.ED, (MBA)

4
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Biotech the future World

4
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Btech (Ece),mtech

4
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A.4
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Evaluate: 8! - 3!?
8!=8*7*6*5*4*3*2*1 3!=3*2*1 8!-3!=8*7*6*5*4*3*2*1-3*2*1 =3*2*1(8*7*6*5*4-1) =6(6720-1) =6(6719) = 40314 Ok all the best.
Deepa
what is meant by relativity motion
It must be a relative motion than relativity motion. When two bodies are moving with some velocity then study of motion of one body with respect to the other body is known as relative motion. :-)
Venkata
How to measure time?
By your actions
Praveenkumar

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