Suppose that the speed of sound in air at a given temperature is $400 m/sec$. An engine blows a whistle at $1200 Hz$ frequency. It is approaching an observer at the speed of $100 m/sec$. What is the apparent frequency as heard by the observer .... $Hz$
Medium
Download our appand get started for free
Experience the future of education. Simply download our apps or reach out to us for more information. Let's shape the future of learning together!No signup needed.*
Similar Questions
- 1Two vibrating tuning forks produce progressive waves given by $y_1= 4 \sin (500 \, \pi t)$ and $y_2= 2 \sin (506 \, \pi t)$. These tuning forks are held near the ear of a person. The person will hearView Solution
- 2A tuning fork vibrates with $2$ beats in $0.04$ second. The frequency of the fork is .... $Hz$View Solution
- 3Equation of a stationary wave is $y = 10\sin \frac{{\pi x}}{4}\cos 20\pi\, t.$ Distance between two consecutive nodes isView Solution
- 4View SolutionWhich of the following equations represents a wave
- 5The equation of the propagating wave is $y = 25\sin (20t + 5x),$ where $y$ is displacement. Which of the following statement is not trueView Solution
- 6A man is standing on a railway platform listening to the whistle of an engine that passes the man at constant speed without stopping. If the engine passes the man at time ${t_0}$. How does the frequency $f$ of the whistle as heard by the man changes with timeView Solution
- 7For a certain organ pipe, the first three resonance frequencies are in the ratio of $1:3:5$ respectively. If the frequency of fifth harmonic is $405\,Hz$ and the speed of sound in air is $324 \,ms ^{-1}$ the length of the organ pipe is $..........m.$View Solution
- 8A $SONAR$ 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 (in $Hz$) of sound reflected by the submarine? Take the speed of sound in water to be $1450\; m s ^{-1}$View Solution
- 9An engine approaches a hill with a constant speed. When it is at a distance of $0.9\, km$, it blows a whistle whose echo is heard by the driver after $5\, seconds$. If the speed of sound in air is $330\, m/s$, then the speed of the engine is .... $m/s$View Solution
- 10View SolutionQuality depends on