When a large block of ice is added to a hot cup of water then it won't melt the ice because mass of water is less. Therefore, heat released or given out by it will be less. Whereas lake is able to dissolve the large block of ice because lake has large mass and thus it will have more heat
To solve this problem we will apply the concepts related to electric potential and electric potential energy. By definition we know that the electric potential is determined under the function:
= Coulomb's constant
q = Charge
r = Radius
At the same time
The values of variables are the same, then if we replace in a single equation we have this expression,
If we replace the values, we have finally that the charge is,
Therefore the potential energy of the system is