Show your work! Include units. Two spheres have their centers 4.0 m apart. One has a mass of 20.0 kg. The other has a mass
of 16.0 kg. What is the gravitational force between them

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. a rider is towed at a constant speed by a rope that is at an angle of 15 ∘ from horizontal. the tension in the rope is 1900 n. the force of the sail on the rider is 30∘ from horizontal. what is the weight of the rider? express your answer with the appropriate units.

Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d