A source of sound of frequency $450$ cycles/sec is moving towards a stationary observer with $34\, m/sec$ speed. If the speed of sound is $340\, m/sec,$ then the apparent frequency will be ..... $cycles/sec$
Easy
Download our app for free and get started
(b) $n' = n\,\left( {\frac{v}{{v - {v_0}}}} \right) = 450\,\left( {\frac{{340}}{{340 - 34}}} \right) = 500$ $cycles/\sec $
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
- 1$A$ source $S$ of frequency $f_0$ and an observer $O$, moving with speeds $v_1$ and $v_2$ respectively, are movinng away from each other. When they are separated by distance a $(t =0)$, a pulse is emitted by the source. This pulse is received by $O$ at time $t_1$ then $t_1$, is equal toView Solution
- 2$25$ tunning forks are arranged in series in the order of decreasing frequency. Any two successive forks produce $3\, beats/sec.$ If the frequency of the first turning fork is the octave of the last fork, then the frequency of the $21^{st}$ fork is .... $Hz$View Solution
- 3A stretched string of length $l,$ fixed at both ends can sustain stationary waves of wavelength $\lambda ,$ given byView Solution
- 4Two sources of sound placed close to each other, are emitting progressive waves given by $ y_1=4sin\left( {600\pi t} \right)$ and $y_2=5sin\left( {608\pi t} \right)$ An observer located near these two sources of sound will hearView Solution
- 5The number of beats produced per second by two vibrations: $x_1 =x_0$ sin $646\pi t$ and $x_2 = x_0 sin 652 \pi t$ isView Solution
- 6A 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 ......... $Hz$View Solution
- 7A body sends waves $100\, mm$ long through medium $A$ and $0.25\, m$ long in medium $B$. If the velocity of waves in medium $A$ is $80\, cms^{-1}$. The velocity fo waves in medium $B$ is .... $ms^{-1}$View Solution
- 8A source of sound of frequency $600 Hz$ is placed inside water. The speed of sound in water is $1500 m/s$ and in air is $300 m/s.$ The frequency of sound recorded by an observer who is standing in air is .... $Hz$View Solution
- 9The ratio of the velocity of sound in hydrogen gas $(\gamma = 7/5)$ to that in helium gas $(\gamma = 5/3)$ at the same temperature will beView Solution
- 10View SolutionQuality of a musical note depends on