1.If the density of oxygen is 16 times that of hydrogen, what will be the ratio of their corresponding velocities of sound waves

2. The temperature at which the speed of sound in air becomes double of its value at 0 ⁰C is

3. If amplitude of waves at distance r from a point source is A, the amplitude at a distance 2r will be

4. If two waves having amplitudes 2A and A and same frequency and velocity, propagate in the same direction in the same phase, the resulting amplitude will be

5.

6. If two tuning forks A and B are sounded together, they produce 4 beats per second. A is then slightly loaded with wax, they produce 2 beats when sounded again. The frequency of A is 256. The frequency of B will be

7.The frequencies of two sound sources are 256 Hz and 260 Hz. At t = 0, the intensity of sound is maximum. Then the phase difference at the time t = 1/16 sec will be

8. In an experiment with sonometer a tuning fork of frequency 256 Hz resonates with a length of 25 cm and another tuning fork resonates with a length of 16 cm. Tension of the string remaining  constant  the frequency  of the second tuning fork is

9.An organ pipe P₁ closed at one end vibrating in its first overtone and another pipe P₂ open at both ends vibrating in its third overtone are in resonance with a given tuning fork. The ratio of lengths of P₁ and P₂ is

10.In a sonometer wire, the tension is maintained by suspending a 50.7 kg mass from the free end of the wire. The suspended mass has a volume of 0.0075 m³. The fundamental frequency of the wire is 260 Hz. If the suspended mass is completely submerged in water, the fundamental frequency will become (take g = 10 ms⁻²)