Apiece of amber is charged by rubbing with a piece of fur. if the net excess charge on the fur is +8.0 nc (+8.0 10-9 c), how many electrons were added to the amber?

Number of electron on the fur will be

Explanation:

We have given net charge on the fur

Charge on one electron

Let there are n number of electrons

So

So number of electron on the fur will be

initial speed when it is dropped is 150 ft/s

now at the same moment the acceleration due to gravity is perpendicular to its velocity

so as we know that

now we have centripetal acceleration a = 32 ft/s^2 as its perpendicular to velocity

while tangential acceleration at the same moment will be zero

so

now radius of curvature is given as

so the radius of curvature just after it is dropped is 703.125 ft