A charged metal sphere is hung vertically from a silk string. If another metal sphere with an identical charge is brought nearby, how will the first sphere move? A.
The first sphere will move toward the second sphere.
B.
The first sphere will not move.
C.
The first sphere will move away from the second sphere.
D.
The first sphere will orbit the second sphere.

where are the vectors ?

the order for strong to weak forces such as

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

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

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it