How far will a body move in 4sec if uniformly accelerated from rest at the rate of 2m/s2

the earths atmosphere is made up of nitrogen and oxygen. solids can turn into gasses through a process called sublimation. sublimation is the transition of a substance directly from the solid to the gas phase, without passing through the intermediate liquid phase.

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electric field is a function of 1/r^2

yes, the force per unit charge for a point charge is inverse square law.