Aroller coaster starts from a height of 60m. a. find the speed when the roller coaster is 30m from the ground and the speed at the ground. how high will the roller coaster rise? assume the roller coaster started at rest. b. answer part a assuming instead that the roller coaster started with an initial speed of 20m/s. c. assuming the roller coaster starts from rest, find the radius r of the largest loop that the roller coaster can navigate without falling.

Consider two metallic rods mounted on insulated supports. one is neutral, the other positively charged. you bring the two rods close to each, but without contact, and briefly ground the the neutral rod by touching it with your hand. show answer correct answer what would be resulting charge (if any) on the initially neutral rod

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?

Which process is represented by the pv diagram? a. the isobaric process b. the isovolumetric process c. the isothermal process d. the adiabatic process