Force becomes 1/4th
<u>Explanation</u>:
- Force between two positively charged particles is given by the equation
F = k×q1×q2/r² So, force is inversely proportional to square of r.
Here, k is a constant, q1 and q2 are the charges which are equal and r is the distance between them.
- So if the distance is doubled, r becomes 2r and r² becomes (2r)² = 4r²
- Force, F then becomes 1/4th of the initial force.
Answer: If the forces on an object are balanced, the net force is zero. If the forces are unbalanced forces, the effects don't cancel each other. Any time the forces acting on an object are unbalanced, the net force is not zero, and the motion of the object changes.
To solve this problem, it is necessary to take into account the concepts of the number of vacations N_v at a given temperature as well as the calculation of the number of atom sites per cubic meter.
For definition the number of atomic sites per cubic meter is given as,
Where,
Avogadro's number
density
A = Atomic weight
Replacing with our values we have
At the same time we know that the number of vacancies 
is defined as,
![[tex]N_v = Ne^{-\frac{Q_v}{KT}}](https://tex.z-dn.net/?f=%5Btex%5DN_v%20%3D%20Ne%5E%7B-%5Cfrac%7BQ_v%7D%7BKT%7D%7D)
[/tex]
Where,
Energy of vacancy
Boltzman constant
T = Temperature
Replacing with the values given we have
Therefore the number of vacancies per cubit meter at 1000°C is
<span>You do not require a force to keep something moving. You only require a force to get it moving. Or to stop it moving. In your everyday experiences, something you get moving seems to come to a stop after you stop pushing it. It is because there are forces (friction) that make it stop. Without those forces, the object would just keep moving. So this would mean the answer would be True.</span>
