If a proton were released from rest at the sphere's surface, what would be its speed far from the sphere?

Let the sphere is having charge Q and radius R

Now if the proton is released from rest

By energy conservation we can say

now take square root of both sides

so the proton will move by above speed and

here Q = charge on the sphere

R = radius of sphere

whitney would be experiencing fear or unintentional terror

this means that the temperature of both substances will be equal