Two trains are traveling on the same track and in the same direction. the first train, which is behind the second train, blows a horn whose frequency is 269 hz. the second train detects a frequency of 290 hz. if the speed of the second train is 13.7 m/s, what is the speed of the first train?

The key to stability is feedback between the reservoir and the fluxes into and/or out of the reservoir. assume that the rate of outflow from a reservoir depends on the size of the reservoir according to the following relationship: outflow rate= k x (size of reservoir), where k is a constant. a reservoir of water has a volume of 5000 liters, and the rate of outflow at steady state is 25 liters per minute. what is k? (give both the numerical value and its units.) what is the residence time? what is the relationship between k and the residence time?

Aplane travels 1000 miles in 5 hours .what is the planes average speed?

=force × distance a. work b. velocity c. pressure d. momentum