While standing near a railroad crossing, you hear a train horn. The frequency emitted by the horn is 400 Hz. If the train is traveling at 75 km/hr and the air temperature is 25 °C, what is the frequency you hear when the train is approaching you?Click for More...
A train is traveling at 30.0 m/s relative to the ground in still air. The frequency of the note emitted by the train whistle is 262 Hz. What frequency fapproach is heard by a passenger on a train moving at a speed of 18.0 m/s relative to the ground in a direction opposite to the first train and approaching it?Click for More...
Part A = traveling away from the listener
Part B = medium (such as air or water)
Part C = traveling toward the source
Part D = medium
Part E = 1/2fs
Part F = 0
Part G = It approaches infinity.
The velocity of the source is positive if the source is ______________. Note that this equation may not use the sign convention you are accustomed to. Think about the physical situation before answering.Click for More...