a (a) We know that at night amount of carbon dioxide in atmosphere increases which raises the density of atmosphere.
Since intensity is directly proportional to density, intensity of sound is more at night.
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$16$ tunning forks are arranged in the order of increasing frequencies. Any two successive forks give $8$ beats per sec when sounded together. If the frequency of the last fork is twice the first, then the frequency of the first fork is
A tuning fork and an air column whose temperature is $51^{\circ} C$ produce $4$ beats in one second, when sounded together. When the temperature of air column decreases the number of beats per second decreases. When the temperature remains $16^{\circ} C$ only one beat per second is produced. The frequency of the tuning fork is ........... $Hz$
Two factories are sounding their sirens at $800\, Hz$ . A man goes from one factory to other at a speed of $2\,m/s$. The velocity of sound is $320\, m/s$. The number of beats heard by the person in one second will be
A train, standing in a station-yard, blows a whistle of frequency $400\,Hz$ in still air. The wind starts blowing in the direction from the yard to the station with a speed of $10\,ms^{-1}$ then value of frequency and speed of sound for observer will be (the speed of sound in still is $340\, ms^{-1}$ )
A pipe of length $1.5\ m$ closed at one end is filled with gas and resonates in its fundamental mode with a tuning fork. Another open organ pipe of same dimensions filled with air resonates in its fundamental mode with same tuning fork. If experiment is performed at $30\,^oC$ (speed of sound in air is $360\ m/sec$ at $30\,^oC$), the speed of sound at $0\,^oC$ in gas is ...... $m/sec$ (Neglect end correction)
If speed of sound in air in $330 \,m / s$ then, find the number of tones present in an open organ pipe of length $1\, m$ whose frequency if $\leq 1000$.