Sometimes a person cannot clearly see objects close up or far away. To correct this type of vision, bifocals are often used. The
1 answer:
You might be interested in
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.