Home › Bihar Board Class 12 (Commerce) › Mathematics › Differential Equations › A radioactive sample has a half life of 5 days. …
A radioactive sample has a half life of 5 days. Of 800 mg, how much remains after 15 days?
A200 mg
B100 mg
C400 mg
D50 mg
Answer & Solution
Correct answer: B. 100 mg
Fifteen days is three half lives, so 800 → 400 → 200 → 100 mg.
Related questions
The thin-film equation, an exception among natural laws, is of which order?Newton's laws give a differential equation for which unknown?Which equation mixes derivatives with integrals of the unknown?An equation whose unknown is a random process is called what?A derivative depending on earlier function values gives which equation?The harmonic oscillator equation approximates which nonlinear equation for small amplitudeWhich theorem gives existence of a first-order solution?In a difference equation, the independent variable takes what kind of values?