A car is on a road parallel to a railroad track and right beside it. The car is travelling east at 30.0 m/s while a train travelling west at 50.0 m/s is approaching it. If the car honks its

horn at a frequency of 1.00 kHz, what is the wavelength of the sound perceived by a person

riding in the train?

(a) 0.235 m

(b) 0.275 m

(c) 0.294 m

(d) 0.313 m

(e) 0.344 m

the answer is 0.313m someone explain to me how to get 0.313m I can only get 0.273m

Identify the forces that contribute to the centripetal force on the object in each of the following examples: a. a bicyclist moving around a flat, circular track b. a bicycle moving around a flat, circular track c. a racecar turning a corner on a steeply banked curve

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

Atwo-stage air compressor operates at steady state, compression 10m^3/min of air from 100 kpa and 300k to 1200 kpa. an intercooler between the two stages cools the air to 300k at a constant pressure of 350 kpa. the compression processes are isentropic. a) calculate the power required to run the compressor, in kw b) compare the result to the power required for isentropic compression from the same inlet state to the same final pressure.