#### berkeman

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The starting equation contains forces. What are the units of force in mks? Each term has to have those same units, right? That helps you figure out the units for the other terms that introduced in the later equations. And yes, since λt is in the exponent, and since the exponent needs to be dimensionless, the units of λ need to be 1/s.The dimensiona of lambda is (time)^-1, time inverse, basically frequency. .M is mass. That is given. I dont or I am not quite sure on c