The answer for this is b 3.500.000j
Absorption occurs when <span>all of the energy from light waves is transferred to a medium! </span>
As the distance between two charged objects increases, the strength of the electrical force between the objects <em>decreases</em>.
Answer:

where E = electric field intensity
Explanation:
As we know that plastic ball is suspended by a string which makes 30 degree angle with the vertical
So here force due to electrostatic force on the charged ball is in horizontal direction along the direction of electric field
while weight of the ball is vertically downwards
so here we have


since string makes 30 degree angle with the vertical so we will have





where E = electric field intensity