A charge of +3.5 nC and a charge of +5.0 nC are separated by 40 cm. Find the equilibrium position for a -6.0 nC charge.

from charge.

Explanation:

Given

The magnitude of the first charge is  

The magnitude of the second charge is

charge must be placed in between the two charges to establish equilibrium

The electrostatic force is given by

Equilibrium will be established when force by both the charges balance out each other. Suppose is placed at a distance of cm from . So, we can write

Canceling similar terms

Thus, the equilibrium position is from charge.

half of a circle

explanation:

the arrow and the top of the circle is matching together. it is not a polygon because a polygon would always be the same shape. therefore, an half of a circle is called semicircle so you would find the radius of it.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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