Variation of inversely proportional

Suppose the force of gravitation is inversely proportional to the cube of the radius of circular orbit in which satellite is revolving then its time period is proportional to

Variation of directly proportional

If the force acting on the body moving in uniform circular motion is inversely proportional to r^3 , then the time period of its revolution is proportional to ?

Walden inversion takes place in SN^2 reaction. Half-life period of SN^2 reaction is inversely proportional to the concentration of the substrate or nucleophile or both.

Time required to decompose half the substance for a n^(th) order reaction is inversely proportional to : (Given that a : initial concentration):

Physical adsorption is inversely proportional to

The wavelength of a spectral life for an electronic transition inversely proportional to: