172960 A bat emits an ultrasonic sound wave at $33.0 \mathrm{kHz}$ and receives and echo $0.1 \mathrm{~s}$ later. What is the distance of the bat from the object-producing echo? (Speed of sound in air is $330 \mathrm{~m} / \mathrm{s}$ )

172961 At what speed should a source of sound move, so that stationary observer find the apparent frequency equal to half of the original frequency?

172962 Due to Doppler's effect the shift in wavelength observed is $0.1 \AA$ for a star producing wavelength $6000 \AA$. Velocity of recession of the star will be :

172963 An observer is watching two sources of sound $A$ and $B$ with same velocity. The former is approaching towards the observer while the later receding. Observer detects 3 beats per second. If frequency of the sources is $500 \mathrm{~Hz}$, then find speed of sources. (approximately).
(Given, speed of air $=330 \mathrm{~m} / \mathrm{s}$ )

172960 A bat emits an ultrasonic sound wave at $33.0 \mathrm{kHz}$ and receives and echo $0.1 \mathrm{~s}$ later. What is the distance of the bat from the object-producing echo? (Speed of sound in air is $330 \mathrm{~m} / \mathrm{s}$ )

172961 At what speed should a source of sound move, so that stationary observer find the apparent frequency equal to half of the original frequency?

172962 Due to Doppler's effect the shift in wavelength observed is $0.1 \AA$ for a star producing wavelength $6000 \AA$. Velocity of recession of the star will be :

172963 An observer is watching two sources of sound $A$ and $B$ with same velocity. The former is approaching towards the observer while the later receding. Observer detects 3 beats per second. If frequency of the sources is $500 \mathrm{~Hz}$, then find speed of sources. (approximately).
(Given, speed of air $=330 \mathrm{~m} / \mathrm{s}$ )

172960 A bat emits an ultrasonic sound wave at $33.0 \mathrm{kHz}$ and receives and echo $0.1 \mathrm{~s}$ later. What is the distance of the bat from the object-producing echo? (Speed of sound in air is $330 \mathrm{~m} / \mathrm{s}$ )

172961 At what speed should a source of sound move, so that stationary observer find the apparent frequency equal to half of the original frequency?

172962 Due to Doppler's effect the shift in wavelength observed is $0.1 \AA$ for a star producing wavelength $6000 \AA$. Velocity of recession of the star will be :

172963 An observer is watching two sources of sound $A$ and $B$ with same velocity. The former is approaching towards the observer while the later receding. Observer detects 3 beats per second. If frequency of the sources is $500 \mathrm{~Hz}$, then find speed of sources. (approximately).
(Given, speed of air $=330 \mathrm{~m} / \mathrm{s}$ )

172960 A bat emits an ultrasonic sound wave at $33.0 \mathrm{kHz}$ and receives and echo $0.1 \mathrm{~s}$ later. What is the distance of the bat from the object-producing echo? (Speed of sound in air is $330 \mathrm{~m} / \mathrm{s}$ )

172961 At what speed should a source of sound move, so that stationary observer find the apparent frequency equal to half of the original frequency?

172962 Due to Doppler's effect the shift in wavelength observed is $0.1 \AA$ for a star producing wavelength $6000 \AA$. Velocity of recession of the star will be :

172963 An observer is watching two sources of sound $A$ and $B$ with same velocity. The former is approaching towards the observer while the later receding. Observer detects 3 beats per second. If frequency of the sources is $500 \mathrm{~Hz}$, then find speed of sources. (approximately).
(Given, speed of air $=330 \mathrm{~m} / \mathrm{s}$ )