A17-car train standing on the siding is started in motion by the train’s engine. 9 cm slack is between each of the cars, which are 9 m long. the engine is tightly connected to the first car and moves at a constant speed of 36 cm/s. how much time is required for the pulse to travel the length of the train? answer in units of s.

The a metal retainer that keeps the rolling elements evenly spaced. n a. seal n b. separator n c. bearing n d outer race

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?

Explain the comparisons between nature and packingtown that appears on pages 81 and 82 answer