(Solution Download) A train whistle is heard at 280Hz as the train approaches town. The train cuts its speed in half as.


A train whistle is heard at 280Hz as the train approaches town. The train cuts its speed in half as it nears the station, and the sound of the whistle is then 270 Hz. What is the speed of the train before slowing down? What is the speed of the train after slowing down?
Wednesday, January 21, 2015 at 3:34pm

Physics
Chinook salmon are able to move through water especially fast by jumping out of the water periodically. This behavior is called porpoising. Suppose a salmon swimming in still water jumps out of the water with velocity 6.41 m/s at 44.1° above the horizontal, sails through ...
Wednesday, January 21, 2015 at 2:57pm

physics
The following charges are located inside a metallic container on unknown shape: 5.00 µC, -4.60 µC, 67.0 µC, and -50.0 µC. Calculate the net electric flux, in Nm2/C, through the container

 







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