PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
Consider two people, each of mass 60 kg, a distance of 10 m apart.
(1) Assuming that all the mass in each person is made out of water, estimate how many electrons there are in each person.
(2) Hence, estimate the electrostatic force of repulsion between the two people due to the electrons.
(3) List any other simplifying assumptions you have made to make your estimate possible.
(4) No such force is observed in practice. Suggest why this is so.