A locomotive approaching a crossing at a speed of 80 mi/h sounds a whistle of frequency 400 Hz when 1 mi from the crossing. There is no wind, and the speed of sound in air is 0.200mi/s. What frequency is heard by an observer 0.60 mi from the crossing on the straight road which crosses the railroad at right angles?

A locomotive approaching a crossing at a speed of 20 ms^(-1) sounds a whistle of frequency 640 Hz when 1 km from the crossing. There is no wind and the speed of sound in air is 330 ms^(-1) . What frequency is heard by an observer sqrt(3) km on the straight road from the crossing at right angle :-

A train approaching a crossing at a speed of 100 km/h sounds a whistle 400 Hz when it is 1.5 km from the crossing. There is no wind and the speed of sound in air is 340 m/s. What frequency is heard by an observer 1.0 km on the strainght road from the crossing at right angles.

A car approaching a crossing C at a speed of 20 m//s sounds a horn of frequency 500 H_(Z) when 80 m from the crossing . Speed of sound in air is 330 m//s . What frequency is heard by an observer (at rest) 60m from the crossing on the straight road which crosses car road at right angles ?

A train approachign a railway crossing at a speed of 120 kmh^-1 sounds a short whistle at frequency 640 Hz when it is 300 m away from the crossing. The speed of sound in air is 340 ms^-1 . What will be the frequency heard by a person standing on a road perpendicular to the track through the crossing at a distance of 400 m from the crossing ?

A train approaching a hill at a speed of 60 km//hour sounds a whistle of frequency 600Hz when it is distance of 1km from the hill. Wind is blowing in the direction of the train with a speed of 60 km//h Find the frequency of the whistle heard by an observer on the hill:speed of sound in air 1200km/h)

A train approaching a hill at a speed of 36 kmph sounds a whistle of frequency 500 Hz when it is at a distance of 1 km. A wind blows at 36 kmph in the direction of the motion of the train. Find (i) the frequency of the whistle as heard by an observer on the hill, (ii) the distance from the hill at which the echo from the hill is heard by the driver and its frequency. Velocity of sound = 1200 kmph

A train approaching a hill at a speed of 40 km//hr sounds a whistle of frequency 580 Hz when it is at a distance of 1km from a hill. A wind with a speed of 40km//hr is blowing in the direction of motion of the train Find (i) the frequency of the whistle as heard by an observer on the hill, (ii) the distance from the hill at which the echo from the hill is heard by the driver and its frequency. (Velocity of sound in air = 1, 200 km//hr )

A train approching a hill at a speed of 40 km//hr sounds a whitstle of frequency 600 Hz when it is at a distance of 1 km from a hill. A wind with a speed of 40 km//hr is blowing in the direction of motion of the train. Find, (a) The frequency of the whistle as heard by an observer on the hill. (b) the distance from the hill at which the echo from the hill is heard by the driver and its frequency (Veocity of sound in air = 1200 km//hr )