How far apart should two protons be if the electrical force of repulsion on each one is equal to its weight on the earth? ( k = 1/4πε 0 = 9.0 × 10 9 N ∙ m 2/C 2, e = 1.6 × 10 -19 C, m proton = 1.67 × 10 -27 kg)

What is the magnitude of the resultant vector round your answer to the nearest tenth

Standing side by side ,you and a friend step off a bridge at different times and fall for 1.6s to the water below.your friend goes first,and you follow after he has dropped a distance of 2.0m.when your friend hits the water,is the seperation between the two of you 2.0m or more than 2.0m? verify your answer with a calculation.

Aspring has a natural length of 8 m. if a 12-n force is required to keep it stretched to a length of 10 m, how much work w is required to stretch it from 8 m to 16 m? (round your answer to two decimal places.)