The question is missing, however, I guess the problem is asking for the value of the force acting between the two balls.
The Coulomb force between the two balls is:

where

is the Coulomb's constant,

is the intensity of the two charges, and

is the distance between them.
Substituting these numbers into the equation, we get

The force is repulsive, because the charges have same sign and so they repel each other.
Scientific evidence such as reflection and photoelectric effect has proven the wave-particle model of electromagnetic radiation to be true.
<h3>What is electromagnet radiation?</h3>
Electromagnetic radiation is radiation produced as a result of the interactions of the electric and magnetic fields.
Some forms of electromagnetic radiation include:
- radio waves
- microwaves
- ultraviolet radiation
- visible light
Electromagnetic radiation can be described using a wave model or a particle model.
The wave property of electromagnetic radiation include:
- diffraction
- reflection
- refraction
The particle property of electromagnetic radiation include:
- photoelectric effect
- Compton effect.
Therefore, the wave-particle model of electromagnetic radiation is correct because it can be backed up by experiments and evidence.
Learn more about wave-particle model at: brainly.com/question/20452331
Answer:
A - Watt
Explanation:
Watt is the unit of electrical power in a metric system, expressed in terms of energy per second, equal to the work done at a rate of 1 joule per second is
power formula is P = V × I,
where V is the voltage in a circuit
I is the current flowing through that circuit.
In the SI (metric) system, the units of power are watts.
It attracts two charged particles which are separated by a definitive distance.......