Kepler and Newton studied the movement of planets. Kepler studied the speed of planets while Newton studied the forces that kept the planets in place. Which of these statements best explains why the two scientists proposed different theories about the planets

Matt is driving down 7th street. he drives 150 meters in 18 seconds. assuming he does not speed up or slow down, what is his speed?

What is the difference between electrically neutral objects and electrically charged objects

Agas is contained in a vertical, frictionless piston–cylinder device. the piston has a mass of 3.2 kg and a cross-sectional area of 35 cm2. a compressed spring above the piston exerts a force of 190 n on the piston. if the atmospheric pressure is 95 kpa, determine the pressure inside the cylinder.