Related InterviewSolutions

• If the velocity of sound in air is `332` meters per second at NTP, find the velocity at `30^(@)C` and `0.7 m` of mercury.
• The velocity of sound in hydrogen is `1270 m s^(-1)` at `0^(@)C` and the frequency of a fork is `335 Hz`. Find the distance travelled by sound in hydrogen at `0^(@)C` and `30^(@)C` in the time in which the fork completes `71` vibrations.
• In what gas at the same temperature is the speed `v` of sound greater - in nitrogen `(N_(2))` or in carbon dioxide `(CO_(2))`? The vibrational modes of gas molecules are not excited. Campare the velocities when vibrational modes are also excited.
• How long will it take for sound waves to travel the distance `l` between points A and B if the air temperature between them varies linearly from `T_(1)` to `T_(2)`? The velocity of sound at `T_(0)` is `C_(0)`.
• Find the temperature at which the velocity of sound in air is double the velocity of sound in air at `0^(@)C`. [Hint : Use `C/C_(0)= sqrt(T/T_(0))`]
• Calculate the velocity of sound in a mixture of two gases obtained by mixing `V_(1)` and `V_(2)` volumes of them if the velocity of sound in them be `C_(1)` and `C_(2)`. The atomicity of the gases is the same.
• Calculate the velocity of sound in a mixture of oxygen, nitrogen and argon at `0^(@)C` when their masses are in the ratio `2 : 7 : 1`. The molecular weights of gases are `32, 28` and `40` respectively
• Velocity of sound through an unknown gas at STO is `258.4 m s^(-1)` and its density `1.977 kg m^(-3)`. What is the atomicity of the molecules of the gas?
• Calculate the velocity of sound in a mixture of two gases obtained by mixing `m_(1)` and `m_(2)` of them if the velocity of sound in them be `C_(1)` and `C_(2)`. The atomicity of the two gases is the same.
• How many degrees of freedom have the gas molecules, if under standard conditions the gas density is `1.3 kg m^(-3)` and the velocity of sound propagation in it is `C=330 m s^(-1)`.