Chapter 17 – Sound Waves
In a Hall, a person receives direct sound waves from a source 120 m away. He also receives a wave from the same source which reaches him after being reflected from the 25 m high ceiling at a point halfway between them. The two waves interfere constructively for wavelengths (in meters)
15
Sep
In a Hall, a person receives direct sound waves from a source 120 m away. He also receives a wave from the same source which reaches him after being reflected from the 25 m high ceiling at a point halfway between them. The two waves interfere constructively for wavelengths (in meters) A thin plane membrane [...]
A man stands between two parallel cliffs (not in middle). When he claps his hands, he hears two echoes one after 1 second and the other after 2 second. If the velocity of sound in air is 330 ms^−1, the width of the valley is
15
Sep
A man stands between two parallel cliffs (not in middle). When he claps his hands, he hears two echoes one after 1 second and the other after 2 second. If the velocity of sound in air is 330 ms^−1, the width of the valley is A man stands between two parallel cliffs (not in middle). [...]
An engine approaches a hill with a constant speed. When it is at a distant of 0.9 km, it blows a whistle whose echo is heard by the driver after 5 seconds. If the speed of sound in air is 330 m/s, then the speed of the engine is:
15
Sep
An engine approaches a hill with a constant speed. When it is at a distant of 0.9 km, it blows a whistle whose echo is heard by the driver after 5 seconds. If the speed of sound in air is 330 m/s, then the speed of the engine is: An engine approaches a hill with [...]
A thin plane membrane separates hydrogen at 7 degree C from hydrogen at 47 degree C, both being at the same pressure. If a collimated sound beam travelling from the cooler gas makes an angle of incidence of 30 degree at the membrane, the angle of refraction is
14
Sep
A thin plane membrane separates hydrogen at 7 degree C from hydrogen at 47 degree C, both being at the same pressure. If a collimated sound beam travelling from the cooler gas makes an angle of incidence of 30 degree at the membrane, the angle of refraction is A thin plane membrane separates hydrogen at [...]
A sound wave travelling with a velocity V in a medium A reaches a point on the interface of medium A and medium B. If the velocity in the medium B be 2V, then the angle of incidence for total internal reflection of the wave will be greater than:
14
Sep
A sound wave travelling with a velocity V in a medium A reaches a point on the interface of medium A and medium B. If the velocity in the medium B be 2V, then the angle of incidence for total internal reflection of the wave will be greater than: A sound wave travelling with a [...]
How many times more intense is a 90 dB sound than a 40 dB sound ?
14
Sep
How many times more intense is a 90 dB sound than a 40 dB sound ? How many times more intense is a 90 dB sound than a 40 dB sound ? September 14, 2020 Category: Cengage NEET by C.P Singh , Chapter 17 - Sound Waves , Part 1 ,
If the intensity of sound is doubled, the intensity level will increase by nearly
14
Sep
If the intensity of sound is doubled, the intensity level will increase by nearly If the intensity of sound is doubled the intensity level will increase by nearly September 14, 2020 Category: Cengage NEET by C.P Singh , Chapter 17 - Sound Waves , Part 1 ,
If the pressure amplitude in a sound wave is tripled, then by what factor the intensity of sound wave is increased ?
14
Sep
If the pressure amplitude in a sound wave is tripled, then by what factor the intensity of sound wave is increased ? If the pressure amplitude in a sound wave is tripled then by what factor the intensity of sound wave is increased ? September 14, 2020 Category: Cengage NEET by C.P Singh , Chapter [...]
A person speaking normally produces a sound intensity of 40 dB at a distance of 1 m. If the threshold intensity for reasonable audibility is 20 dB, the maximum distance at which he can be hear clearly is
14
Sep
A person speaking normally produces a sound intensity of 40 dB at a distance of 1 m. If the threshold intensity for reasonable audibility is 20 dB, the maximum distance at which he can be hear clearly is A person speaking normally produces a sound intensity of 40 dB at a distance of 1 m. [...]
A sound has an intensity of 2×10^−8W/m^2. Its intensity level in decibels is (log102 = 0.3)
14
Sep
A sound has an intensity of 2×10^−8W/m^2. Its intensity level in decibels is (log102 = 0.3) A sound has an intensity of 2×10^−8W/m^2. Its intensity level in decibels is (log102 = 0.3) September 14, 2020 Category: Cengage NEET by C.P Singh , Chapter 17 - Sound Waves , Part 1 ,