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[" The time dependence of a physical qua...

[" The time dependence of a physical quantity "P" is "],[" given by "P=P_(0)exp(-alpha t^(2))," where "alpha" is a constant "],[" and "t" is time.The constant "alpha],[" (1) is dimensionless "],[" (2) has dimensions "[T^(-2)]],[" (3) has dimensions of "P],[" (4) has dimensions "[T^(2)]]

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