EASY
Earn 100

The velocity of sound in a gas is inversely proportional to the square root of the of the gas.

50% studentsanswered this correctly

Important Questions on Sound Waves

MEDIUM
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
Consider a gas with molar mass M. If the sound at frequency f is introduced to a tube of this gas at temperature T then an internal acoustic standing wave is set up with nodes separated by L. The adiabatic constant γ=CpCv is
MEDIUM
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
Let the speed of sound at 0 °C be 332 m s-1. On a winter day sound travels 342 m in one second. The atmospheric temperature on that day is
MEDIUM
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
A sound wave of frequency 200 Hz is travelling in air. The speed of sound in the air is 340 m s-1. What is the phase difference at a given instant between two points separated by a distance of 85 cm along the direction of propagation?
EASY
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
The velocity of sound in air is independent of change in
MEDIUM
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
The pressure wave, P=0.01sin⁡1000t-3xN m–2 , corresponds to the sound produced by a vibrating blade on a day when atmospheric temperature is 0°C . On some other day when temperature is T , the speed of sound produced by the same blade and at the same frequency is found to be 336 m s–1 . Approximate value of T is:
MEDIUM
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
A bomb explodes at time t=0 in a uniform, isotropic medium of density ρ and releases energy E, generating a spherical blast wave. The radius R of this blast wave varies with time t as
EASY
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
Two waves of sound of wavelength 1.2 m and 1.25 m in a medium produce 90 beats in 10 s. The speed of sound in the medium is
EASY
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
Sound travels fastest in
EASY
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
Sound waves of wavelength λ and velocity v in medium- 1 enter medium- 2 . If their velocity in medium- 2 is 4 v, the wavelength in medium- 2 is
EASY
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
It takes 2.0 seconds for a sound wave to travel between two fixed points when the day temperature is 10°C. If the temperature rises to 30°C, the sound wave travels between the same fixed parts in
EASY
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
When sound travels from air to water the quantity that remains unchanged is
MEDIUM
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
Consider a system of gas of a diatomic molecule in which the speed of sound at 0oC is 1260 m s-1 . Then, the molecular weight of the gas is in g mol-1, (given, the gas constant R is 8.314 J mol-1 K-1)
HARD
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
A person in front of a mountain is beating a drum at the rate of 40 per minute and hears no distinct echo. If the person moves 90 m closer to the mountain, he has to beat the drum at 60 per minute to not hear any distinct echo. The speed of sound is
 
EASY
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
A hospital uses an ultrasonic scanner to locate tumors in a tissue. The operating frequency of the scanner is 4.2 MHz. The speed of sound in a tissue is 1.7 km/s. The wavelength of sound in the tissue is
MEDIUM
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
A tunning fork of frequency 480 Hz is used in an experiment for measuring speed of sound v in air by resonance tube method. Resonance is observed to occur at two successive lengths of the air column, l1=30 cm and l2=70  cm. Then, ν is equal to:
HARD
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases

If the particle starts its motion from mean position, the phase difference between displacement and acceleration is ____.

EASY
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
A sound wave has a frequency of 200 Hz and a speed of 400 m s-1 in a medium. Find the wavelength of the sound wave in metres.
EASY
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
The thunder of cloud is heard 9.8 seconds later than the flash of lightning. If the speed of sound in air is 330 m s-1, what will be the height of cloud in metres?
MEDIUM
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
What are the factors that affect the speed of sound in gases?
MEDIUM
Physics>Oscillations and Waves>Sound Waves>Speed of Sound in Gases
Air temperature in the Rajasthan desert can reach 46°C. What is the velocity of sound (in m s-1) in air at that temperature? (Take Vo = 331 m s-1 and answer upto two decimal places).