A man sets his watch by the sound of a siren placed at a distance $1 \,km$ away. If the velocity of sound is $330 \,m/s$
Easy
Download our app for free and get started
(b) ${\rm{Time}} = \frac{{{\rm{Distance }}}}{{{\rm{Velocity}}}} = \frac{{1000}}{{330}} = 3.03\,\sec $.
Sound will be heard after $3.03 \,sec.$ So his watch is set $3sec$, slower.
Sound will be heard after $3.03 \,sec.$ So his watch is set $3sec$, slower.
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
- 1View SolutionThe diagram below shows the propagation of a wave. Which points are in same phase
- 2A clamped string is oscillating in $n^{th}$ harmonic, thenView Solution
- 3View SolutionA closed organ pipe (closed at one end) is excited to support the third overtone. It is found that air in the pipe has
- 4Consider two sound sources $S_1$ and $s_2$ having same frequency $100\,\,Hz$ and the observer $O$ located between them as shown in the fig. All the three are moving with same velocity in same direction. The beat frequency of the observer is .... $Hz$View Solution
- 5The equation of a progressive wave is $y = 8\sin \left[ {\pi \left( {\frac{t}{{10}} - \frac{x}{4}} \right) + \frac{\pi }{3}} \right]$. The wavelength of the wave is .... $m$View Solution
- 6A motor cycle starts from rest and accelerates along a straight path at $2 \;m / s ^{2}$. At the starting point of the motor cycle there is a stationary electric siren. How far has the motor cycle gone when the driver hears the frequency of the siren at $94 \%$ of its value when the motor cycle was at rest?View Solution
(Speed of sound $=330 ms ^{-1}$)
- 7The two interfering waves have intensities in the ratio $9 : 4$. The ratio of intensities of maxima and minima in the interference pattern will beView Solution
- 8A sine wave of wavelength $\lambda $ is travelling in a medium. The minimum distance between the two particles, always having same speed, isView Solution
- 9View SolutionThe note"Saa" on the Sarod and the Sitar have the same pitch. The property of sound that is most important in distinguishing between the two instruments is
- 10The velocity of sound is $v_s$ in air. If the density of air is increased to $4$ times, then the new velocity of sound will beView Solution