What is the gravitational attraction between two objects of mass 5,000,000 KG (5.0 x 10^6 kg) at a distance of 100 m from each other? Estimate G as 6.67 x10^-11n (m/kg)^2

The protons in a nucleus are approximately 2 ✕ 10^−15 m apart. consider the case where the protons are a distance d = 1.93 ✕ 10^−15 m apart. calculate the magnitude of the electric force (in n) between two protons at this distance.

Four identical lab carts each have a mass of 200 kg. different masses are added to the carts and the velocities are measured. all carts move to the right.

Which statements did both aristotle and ptolemy assume? check all that apply.