At table tennis ball has a positive charge of 4.50 × 10-8 coulombs. it experiences a force of 2.72 × 10-3 newtons due to an electric field. what is the strength of the electric field?
2.72 × 10-10 newtons/coulomb
4.50 × 10-11 newtons/coulomb
6.04 × 104 newtons/coulomb
1.24 × 105 newtons/coulomb

A200-n force is applied to the foot-operated air pump. the return spring s exerts a 2.6-n·m moment on member oba for this position. determine the corresponding compression force c in the cylinder bd. if the diameter of the piston in the cylinder is 40 mm, estimate the air pressure generated for these conditions. state any assumptions. enter a positive number for the compression force c.