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The time dependence of physical quantity...

The time dependence of physical quantity p is given by `p = p_(0)` exp `(-alphat^(2))`, where `alpha` is a constant and t is the time. The constant `alpha`

A

is dimensionless

B

has dimension `T^(-2)`

C

has dimension `T^(2)`

D

has dimension of p

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The correct Answer is:
B
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