A2.5g copper penny is given a charge of -4.0*10^-9c. how mny excess electrons are on the penny?

Answer : The excess of electrons on the penny are, electrons

Solution : Given,

Total charge =

Charge on electron =

Formula used :

Now put all the given values in this formula, we get the excess of electrons present on the penny.

Therefore, the excess of electrons on the penny are, electrons

truck y has a greater velocity than truck x.