Question Detail
Question
If the number of radioactive atoms is N(t) = N₀ exp(−kt), where N₀ is the number at t=0, what is the dimension of k?
Correct Answer
Option D is the correct answer.
Detailed Explanation
The exponent (−kt) must be dimensionless. t has dimension T, so k must have dimension T⁻¹.
Hint
The argument of an exponential function must be dimensionless.