Two solid brass spheres have a gravitational attraction of 2 x 10 -5 N when placed in contact with each other. If two additional solid brass spheres are created with twice the radius and placed in contact with one another, what would the gravitational attraction between them be?

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.

Asatellite component is in the shape of a cube with 10cm edges, has an evenly distributed mass of 2 kg and one bolt hole at each of four corners. if the maximum predicted random vibration environment is 10 grms, what bolt size would be a good choice for restraint? what other factors might drive bolt size besides force/stress?

The velocity of sound wave in air at 35°c is 353m/s, calculate the velocity of sound at 46°c