A car is driving directly south down a road. It slows down to stops at a few stop signs, and then, accelerates up to 30 miles
per hour.
Is the car's velocity changing? Why or why not?

d) physical means can be used to separate the components of air.

force required to detach it is given by

charges are taken to be fundamental charge

now we have

so above is the minimum distance at which it will detach