Answer:

Explanation:
The electric field is defined as the electric force per unit of charge, this is:
.
The electric force can be obtained through Coulomb's law, which states that the electric force between to electrically charged particles is inversely proportional to the square of the distance between them and directly proportional to the product of their charges. The electric force can be expressed as
.
By substitution we get that

Now, letting
be the electric field at point A, letting
be the electric field at point B, and letting R be the distance from the charge to A:
.
The ration of the electric fields is

This means that at half the distance, the electric field is four times stronger.
D. Was a leader in the woman's suffrage movement
Answer:
Radio waves heading upward from Earth often bounce off the thermosphere-D.
Answer:
<u>Protons</u> and <u>Neutrons</u> are the two types of nucleons that make up a nucleus. The <u>electrostatic</u> force exists between <u>protons</u> in the nucleus because of their charge. Because it is repulsive, this force tends to make a nucleus <u>unstable</u>. However, the <u>strong nuclear</u> force acts between protons, between neutrons, and between protons and neutrons. This force helps to make a nucleus <u>stable</u>, because it is always attractive.
Explanation:
The nucleus of an atom contains two types of particles, protons and neutrons. Proton has a positive charge, while neutron has no charge. The protons have a repulsive electrostatic force between each other, due to like charges. Due to this repulsive force protons tend to scatter away making the nucleus unstable. In order to overcome this, a force inside the nucleus binds these protons and neutrons together. This attractive force is called strong nuclear force. This force acts on very short ranges.