4.

Then a charped balloon sticks to a wall, the downward gravitational force is balanced by an upward statio friction force. The normal force is provided by the eloctrical attraction between ie charged balioon and the equal but oppositely charged polarization induced in the wal's molecules. Part A If the mass of a baloon is 2.3g, It coeticient of static friction with the wall is 0.73 , and the avorage distance betweon the cpposile charges is 0.75 men, what minimum amount of charge must be placed on the baloon in erder for is to stick to the wal? Express your answer to two significant figures and include appropriate units