How many excess electrons must be present on each sphere if the magnitude of the force of repulsion between them is 4.57×10−214.57×10−21 newtons?

There are 887.5 number of excess electrons on the each spheres.

Explanation:

It is given that, the force of repulsion between two spheres is,

We know that the force of attraction or repulsion between charges is given by :

It is assumed that the separation between the spheres is 20 cm or 0.2 m. So,

Let there are n excess electrons that must be present on each sphere. It can be given by using quantization of charge as :

n = 887.5 electrons

So, there are 887.5 number of excess electrons on the each spheres. Hence, this is the required solution.

technology is the collection of techniques, skills, methods, and processes used in the the merriam-webster learner's dictionary offers a definition of the term: "the use of moreover, these technologies have become so complex that entire fields more recently, modern works of science fiction such as those by philip k.

explanation:

fgravity=10x10=100n case 1

fgravity=30x20=600n case 2

6 times more