A train, standing in a station yard, blows a whistle of frequency $400 \,\,Hz$ in still air. The wind starts blowing in the direction from the yard to the station with a speed of $10\,\,m/s.$ Given that the speed of sound in still air is $340\,\,m/s.$ Mark the INCORRECT statement :
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
- 1A string is fixed at both ends vibrates in a resonant mode with a separation $2.0 \,\,cm$ between the consecutive nodes. For the next higher resonant frequency, this separation is reduced to $1.6\,\, cm$. The length of the string is .... $cm$View Solution
- 2The ratio of intensities between two coherent sound sources is $4: 1$. The difference of loudness in dB between maximum and minimum intensities when they interfere in the space is ..........View Solution
- 3Three waves of equal frequency having amplitudes $10 \,\mu \, m, 4 \, \mu \,m$ and $7 \mu m$ arrive at a given point with successive phase difference of $\frac{\pi }{2}$. The amplitude of the resulting wave in $\mu \,m$ is given byView Solution
- 4The path difference between the two waves ${y_1} = {a_1}\sin \,\left( {\omega t - \frac{{2\pi x}}{\lambda }} \right)$ and ${y_2} = {a_2}\cos \,\left( {\omega t - \frac{{2\pi x}}{\lambda } + \phi } \right)$ isView Solution
- 5View SolutionEnergy is not carried by which of the following waves
- 6The vibrations of four air columns under identical conditions are represented in the figure below. The ratio of frequencies $n_p: n_q: n_r: n_s$ will beView Solution
- 7A $SONAR$ 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
- 8An open tube is in resonance with string (frequency of vibration of tube is $n_0$). If tube is dipped in water so that $75\%$ of length of tube is inside water, then the ratio of the frequency of tube to string now will beView Solution
- 9The equation for spherical progressive wave is (where $r$ is the distance from the source)View Solution
- 10Suppose 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 .... $Hz$View Solution