Question Answers
Sahay Sir > Question Answers
A source of frequency f is moving along line with a constant velocity vs and observer is separated from the line of motion of the source as shown in figure. Plot apparent frequency observed by the observer versus time graph.
07
Sep
A source of frequency f is moving along line with a constant velocity vs and observer is separated from the line of motion of the source as shown in figure. Plot apparent frequency observed by the observer versus time graph. Two trains A and B simultaneously start moving along parallel tracks from a station along [...]
Two trains A and B simultaneously start moving along parallel tracks from a station along same direction. A starts with constant acceleration 2 m/s^2 from rest, while B with the same acceleration but with initial velocity of 40 m/s.
07
Sep
Two trains A and B simultaneously start moving along parallel tracks from a station along same direction. A starts with constant acceleration 2 m/s^2 from rest, while B with the same acceleration but with initial velocity of 40 m/s. Two trains A and B simultaneously start moving along parallel tracks from a station along same [...]
A source of sonic oscillations with frequency n = 1700 Hz and a receiver are located on the same normal to a wall. Both the source and receiver are stationary, and the wall recedes from the source with velocity u = 6
07
Sep
A source of sonic oscillations with frequency n = 1700 Hz and a receiver are located on the same normal to a wall. Both the source and receiver are stationary, and the wall recedes from the source with velocity u = 6 A source of sonic oscillations with frequency n = 1700 Hz and a [...]
A band playing music at a frequency f is moving towards a wall at a speed vb. A motorist is following the band with a speed vm. If V is the speed of sound, obtain an expression for the beat frequency heard by the motorist.
07
Sep
A band playing music at a frequency f is moving towards a wall at a speed vb. A motorist is following the band with a speed vm. If V is the speed of sound, obtain an expression for the beat frequency heard by the motorist. A band playing music at a frequency f is moving [...]
Two cars A and B are travelling in opposite directions at 30 m/s each, cross each other while car A is whistling. If the frequency of the node is 3600 Hz find the apparent frequency as heard by an observer in car B: (a) Before the cars cross each other
07
Sep
Two cars A and B are travelling in opposite directions at 30 m/s each, cross each other while car A is whistling. If the frequency of the node is 3600 Hz find the apparent frequency as heard by an observer in car B: (a) Before the cars cross each other cross each other while car [...]
When both source and observer approach each other with a speed equal to the half the speed of sound, then determine the percentage change in frequency of sound as detected by the listener.
07
Sep
When both source and observer approach each other with a speed equal to the half the speed of sound, then determine the percentage change in frequency of sound as detected by the listener. then determine the percentage change in frequency of sound as detected by the listener. When both source and observer approach each other [...]
A source of frequency f is moving towards the observer along the line with a constant velocity vs as shown in figure. Plot apparent frequency observed by the observer versus time graph.
07
Sep
A source of frequency f is moving towards the observer along the line with a constant velocity vs as shown in figure. Plot apparent frequency observed by the observer versus time graph. A source of frequency f is moving towards the observer along the line with a constant velocity vs as shown in figure. Plot [...]
If a listener L is at rest and the siren in previous illustration is moving away from L at a speed of 30 m/s, what frequency does the listener hear?
07
Sep
If a listener L is at rest and the siren in previous illustration is moving away from L at a speed of 30 m/s, what frequency does the listener hear? If a listener L is at rest and the siren in previous illustration is moving away from L at a speed of 30 m/s what [...]
A police siren emits a sinusoidal wave with frequency fs = 300 Hz. The speed of sound is 340 m/s. (a) Find the wavelength of waves if the siren is at rest in the air. (b) If the siren is moving at 30 m/s,
07
Sep
A police siren emits a sinusoidal wave with frequency fs = 300 Hz. The speed of sound is 340 m/s. (a) Find the wavelength of waves if the siren is at rest in the air. (b) If the siren is moving at 30 m/s, A firework charge is detonated many metres above the ground. At [...]
A firework charge is detonated many metres above the ground. At a distance of 400 m from the explosion, the acoustic pressure reaches a maximum of 10.0 N/m^2. Assume that the speed of sound is constant at 343 m/s
07
Sep
A firework charge is detonated many metres above the ground. At a distance of 400 m from the explosion, the acoustic pressure reaches a maximum of 10.0 N/m^2. Assume that the speed of sound is constant at 343 m/s A firework charge is detonated many metres above the ground. At a distance of 400 m [...]