Two observers A and B are provided with a source of the sound of frequency 500 Hz. A remains stationary and B moves away from him at a velocity of 18 m/s. How many beats per second are observed by B, the velocity of sound in air being 330 m/s

Two observers A and B are provided with a source of the sound of frequency 500 Hz. A remains stationary and B moves away from him at a velocity of 18 m/s. How many beats per second are observed by B, the velocity of sound in air being 330 m/s

A column of air is set into vibration and the note emitted gives 10 beats per second when a tuning fork of frequency 440 Hz is sounded, the temperature being 20°C. The frequency of beats decreases when the tuning fork is loaded with a small piece of wax. at what temperature the unloaded fork and the air column will be in unison?

A column of air is set into vibration and the note emitted gives 10 beats per second when a tuning fork of frequency 440 Hz is sounded, the temperature being 20°C. The frequency of beats decreases when the tuning fork is loaded with a small piece of wax. at what temperature the unloaded fork and the air column will be in unison?

The noise from an airplane engine 25.0 m from an observer is found to have an intensity of 45.0 dB. What will be the intensity in decibel when the plane flies overhead at an altitude of 2.0 Km?

The noise from an airplane engine 25.0 m from an observer is found to have an intensity of 45.0 dB. What will be the intensity in decibel when the plane flies overhead at an altitude of 2.0 Km?

A note produces 2 beats/s with a tuning fork of frequency 480 Hz and 6 beats/s with a tuning fork of 472 Hz. Find the frequency of the note.

A note produces 2 beats/s with a tuning fork of frequency 480 Hz and 6 beats/s with a tuning fork of 472 Hz. Find the frequency of the note.

The intensity level from a loudspeaker is 100 dB at a distance of 10 m. What is its intensity level at a distance of 100 m?

The intensity level from a loudspeaker is 100 dB at a distance of 10 m. What is its intensity level at a distance of 100 m?

The intensity level from a loudspeaker is 100 bB at a distance of 10 m. What is its intensity level at a distance of 200 m?

The intensity level from a loudspeaker is 100 bB at a distance of 10 m. What is its intensity level at a distance of 200 m?

A car is moving away from a stationary listener with a velocity of 20 m/s. if the horn is sounding at frequency 512 Hz, calculate the change in pitch of the sound received by the listener.

A car is moving away from a stationary listener with a velocity of 20 m/s. if the horn is sounding at frequency 512 Hz, calculate the change in pitch of the sound received by the listener. (Velocity of sound in air = 330 m/s).

An observer traveling with a constant velocity of 20 m/s, passes close to a stationary source of sound and notices that there is a change of frequency of 50 Hz as he passes the source.

An observer traveling with a constant velocity of 20 m/s, passes close to a stationary source of sound and notices that there is a change of frequency of 50 hz as he passes the source. What is the frequency of the source? Speed of the sound in air = 340 m/s

A source of sound generates sound waves that travel with a speed of 340 m/s. The frequency of the source is  500 Hz. Find the frequency of the sound heard.

A source of sound generates sound waves that travel with a speed of 340 m/s. The frequency of the source is  500 Hz. Find the frequency of the sound heard if:

1. The source is moving towards the stationary observer with a speed of 30 m/s.
2. The observer is moving towards the stationary source with a speed of 30 m/s.
3. Both the source and the observer move with the speed of 30 m/s and approach one another.

When a jet plane is flying at an elevation of 1000 m the sound level on the ground is 4.0 dB. What would be the intensity level on the ground when its elevation is as low as 50 m?

When a jet plane is flying at an elevation of 1000 m the sound level on the ground is 4.0 dB. What would be the intensity level on the ground when its elevation is as low as 50 m?