The whistle on a train produces a sound wave with a particular pitch. which of the following best describes the whistle sound that a person perceives while the train approaches him or her? a. a higher pitch, then a lower pitch b. the same pitch c. a higher pitch d. a lower pitch

The boy of mass 30 kg is at r1= 2 meters from the fulcrum. of the girl is 45 kg, at what r2 must she sit so that they are balanced ?

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?

Multiply or divide to make this english distance conversion. 174 inches = feet (14.5, 58, 2,088, 23)