A sphere has a net charge of 8.11 nC, and a negatively charged rod has a charge of −6.13 nC. The sphere and the rod undergo a process such that 4.20 ✕ 109 electrons are transferred from the rod to the sphere. What are the charges of the sphere and the rod after this process?

Charge of the sphere =

Charge of the rod =

Explanation:

Parameters given:

Initial charge of sphere = 8.11 nC =

Initial charge of rod = -6.13 nC =

In the process, the rod lost . We have to find the charge of these electrons. Then, we subtract it from the rod's initial charge to get its final charge and add it to the sphere's initial charge to get its final charge.

Charge of electrons = electronic charge * number of electrons

           =

           =

FINAL CHARGE OF ROD

Final charge of rod = - ()

                                =

FINAL CHARGE OF SPHERE

Final charge of sphere = + ()

                                      =

thermal energy is the answer

air exerts forces on falling objects near earth’s surface.

explanation:

the term 'free falls' refer to object that are falling towards the earth, in a situation in which gravity is the only force acting on the object.

for an object in free fall, the acceleration is constant (g, the gravitational acceleration), and so the velocity of the object constantly increases.

for objects near earth's surface, there is always another force acting on the object: the resistance due to the air. this force is opposed to the direction of fall of the object, and it is proportional to the velocity of the object, so as the object falls down, this force increases up to a point when it balances the force of gravity, and the object continues its motion at constant velocity (called terminal velocity). since in this case gravity is not the only force acting on the object, we are not in a situation of free fall.