Asphere of radius 5.15 cm and uniform surface charge density +12.1 µc/m2 exerts an electrostatic force of magnitude 35.9 ✕ 10-3 n on a point charge +1.75 µc. find the separation between the point charge and the center of the sphere.

The radius of the sphere is r=5.15 cm=0.0515 m, and its surface is given by


So the total charge on the surface of the sphere is, using the charge density 
:


The electrostatic force between the sphere and the point charge is:

where
ke is the Coulomb's constant
Q is the charge on the sphere
 is the point charge
r is their separation

Re-arranging the equation, we can find the separation between the sphere and the point charge:

Show him another sport or something

Answer

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

explanation

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force