At the top of a trajectory, a mortar shell explodes into two fragments: a 2.5 kg piece moves south west with a horizontal velocity of 100 m/s while 3.5 kg piece moves north with a horizontal velocity of 70 m/s. What was the horizontal direction of the cell just before explosion?

Ababy stroller is a rest on top of a hill which is 10 m high. the stroller and baby have a mass of 20 kg. what is the potential energy of the baby and stroller?

Arotating space station is said to create “artificial gravity”—a loosely-defined term used for an acceleration that would be crudely similar to gravity. the outer wall of the rotating space station would become a floor for the astronauts, and centripetal acceleration supplied by the floor would allow astronauts to exercise and maintain muscle and bone strength more naturally than in non-rotating space environments. if the space station is 200 m in diameter, what angular velocity would produce an “artificial gravity” of 9.80 m/s^{2} 2 at the rim?

Name the non metal condut electricity