A change in temperature causes a change in density. true or false?
2 answers:
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Answer:
The power of the distance is -1.
Explanation:
The equation for the electric potential of a point charge is given by
where V is the electric potential, k is Coulomb's constant (it has a value of with units
), q is the electric charge of the small charge and r is the distance from the charge.
Now, the power of a number is how many times we multiply that number by itself; we see r appears only once in the equation. So we know the power is 1. But we can see in the equation that k and q are divided by r, which means r is the denominator. This means the power of r is negative (-).
Therefore, the power of r is -1.