Submarine `A` is going with speed of `18km//hr`. Submarine `B` is chasing `A` with speed of `27 km//hr`. It sends frequency of `500Hz` and hears after reflection from `A`. The perceived frequency is :
`(V_("sound in water")=1500m//s)`

The sirens of two ambulances have a frequency of 500 Hz each. An observer hears the sirem from the two engines, one approaching him with a speed of 18 km/hr and other going away from him at a speed of 36 km/hr. Determine the difference in frequency of two sirens heard by the observer. Take, speed of sound in air = 340 m/s.

A sonar system fixed in a submarine operates at a frequency 40.0 kHz, An enemy subarine moves towords the sonar with a speed of 360 km/h. What is the frequency of sound refielcted by the submarine? (Take the speed of sound in water to be 1450 m/s)

A SONAR system fixed in a submarine operates at a frequency 40.0 kHz. An enemy submarine moves towards the SONAR with a speed of 360 km h^-1 . What is the frequency of sound reflected by the submarine ?Take the speed of sound in water to be 1450m s^-1 .

A SONAR system fixed in a submarine operates at a frequency 50 kHz. It is moving towards a rocky hill present inside water with a speed of 432 km h^(-1) . What is the apparent frequency of sound observed at the submarine after reflection by the rocky hill ? (Take velocity of sound in water to be 1450 m s^(-1) )

A SONAR system fixed in a submarine operates at a frequency40.0 kHz. An enemy submarine moves towards the SONAR with a speed of 360km h^(-1) .What is the frequency of sound reflected by the submarine? Take the speed of sound in water to be 1450ms^(-1)

A sonar system fixed in a submariene operatres at a frequency 40KHz. An enemey submarine moves towards the sonar with a speed of 360kmh^(-1) . What is the frequency of sound reflected by the submarine? Speed of sound in water 1450ms^(-1)?

A car moving with a velocity of 36 km/hr crosses a siren of frequency 500 Hz. The apparent frequency of the siren after passing it will be

A sonar system fixed in a submarine operates at a frequency 40.0 kHz. An enemy submarine moves towards the sonar with a speed of 360kmh^(-1) . What is the frequency of sound reflected by the submarine ? Take the speed of sound in water to be 1450ms^(-1)

A SONAR system fixed in a submarine operates at a frequency 40.0 kHz. An enemy submarine moves towards the SONAR with a speed of 360 kmh^(-1) .What is the frequency of sound reflected by the submarine? Take the speed of sound in water to be 1450 ms^(-1) .

A particle goes A to M with a speed of 30 km/hr. and M to B with a speed of 50 km/hr. If MB = 5AM, the average speed in km/hr for the whole journey is –