A wave of frequency 400hz in air has a speed of 320m/s find it’s wavelength. what will be the new wavelength when it enters water in which its speed is 1600m/s?

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?

The material that keeps its new shape after it is stretched is called?

Acar drives toward the right over the top of a hill, as shown below. which arrow represents the centripetal acceleration? w x y z