skelly the child skater is propelled by rocket power. skelly and the rocket together have a mass of 25 kg. when the thrusting force is 100 N and friction is 20 N, a) what will be skellys acceleration? b) how far will he go in 5 s if he starts from rest?

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

What are chlorofluorocarbons and what impact do they have on the atmosphere?

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?