Two people, who might be treated as point masses for this problem, encompass masses of 66 kg and 84 kg. They carry equivalent however opposite charges. The negative charge is due to 3.5×1010 surplus electrons. The individuals are ten m apart. Suppose that the people are mostly water for which 6.02×1023 molecules consists of a mass of 18 g.
i) Determine the number of molecules of water which are there in the more massive person?
ii) Determine the magnitude of the gravitational force of attraction among the two people?
iii) Determine the magnitude of the electrical force of attraction among the two people?
iv) Determine the ratio of the magnitudes of gravitational force to the electric force? (Take note of the number of charges and number of water molecules; the outcome emphasizes the weakness of gravity.)