Physics - Modern Physics Question with Solution | TestHub
PhysicsModern PhysicsRadioactivityEasy2 minQB
PhysicsEasyinteger
If 20 gm of a radioactive substance due to radioactive decay reduces to 10 gm in 4 minutes, then in what time (in minutes) 80 gm of the same substance will reduce to 20 gm -
Answer:
8
Solution:
20 gm → 10 gm in 4 min, so min
80 gm → 20 gm takes 2 half-lives, so t = 8 min
Answer 8
Stream:JEESubject:PhysicsTopic:Modern PhysicsSubtopic:Radioactivity
⏱ 2mℹ️ Source: QB
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