An observer starts moving with uniform acceleration $a$ toward a stationary sound source emitting a whistle of frequency $n.$ As the observer approaches source, the apparent frequency, heard by the observer varies with time as
Medium
Download our app for free and get started
(b) For observer approaching a stationary source
$n' = \frac{{v + {v_0}}}{v}.n$ and given ${v_0} = at$==>$n' = \left( {\frac{{an}}{v}} \right)\;t + n$
this is the equation of straight line with positive intercept $n$ and positive slope $\left( {\frac{n}{v}} \right)$.
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 toy-car, blowing its horn, is moving with a steady speed of $5\, m/s$ , away from a wall. An observer, towards whom the toy car is moving, is able to hear $5\, beats$ per second. If the velocity of sound in air is $340\, m/s$, the frequency of the horn of the toy car is close to ... $Hz$View Solution
- 2View SolutionThe speed of sound in any gas depends upon
- 3Two tuning forks $A$ and $B$ sounded together give $6$ beats per second. With an air resonance tube closed at one end, the two forks give resonance when the two air columns are $24 cm$ and $25 cm$ respectively. Calculate the frequencies of forks.View Solution
- 4Regarding speed of sound in gas match the followingView Solution
$(A)$ Temperature of gas is made $4$ times and pressure $2$ times
$(P)$ Speed becomes $2\sqrt 2$ times
$(B)$ Only pressure is made $4$ times without change in temperature
$(Q)$ Speed become $2$ times
$(C)$ Only temperature is changed to $4$ times
$(R)$ Speed remains unchanged
$(D)$ Molecular mass of the gas is made $4$ times
$(S)$ Speed becomes half
- 5View SolutionWhich of the following equations represents a travelling wave ?
- 6A string fixed at one end is vibrating in its second overtone. The length of the string is $10\ cm$ and maximum amplitude of vibration of particles of the string is $2\ mm$ . Then the amplitude of the particle at $9\ cm$ from the open end isView Solution
- 7The frequency of fundamental tone in an open organ pipe of length $0.48 m$ is $320 Hz.$ Speed of sound is $320 m/sec.$ Frequency of fundamental tone in closed organ pipe will be ... $Hz$View Solution
- 8View SolutionWhich of the following is different from others
- 9If the equation of transverse wave is $y = 5\sin 2\pi \left[ {\frac{t}{{0.04}} - \frac{x}{{40}}} \right]$, where distance is in $ cm$ and time in second, then the wavelength of the wave is .... $cm$View Solution
- 10A wire of variable mass per unit length $\mu = \mu _0x$ , is hanging from the ceiling as shown in figure. The length of wire is $l_0$ . A small transverse disturbance is produced at its lower end. Find the time after which the disturbance will reach to the other endsView Solution
