At what temperature, the velocity of sound will be double its value at 273 K?

The intensity ratio of two waves is 1:16. The ratio of their amplitudes is

The intensity level of a sound wave is said to be 4 decibel. If the intensity of wave is doubled, then the intensity level of sound as expressed in decibel would be

The ratio between amplitudes of two superposing waves is 3 : 2. The ratio between the maximum and minimum intensities of the resultant wave will be

If a tuning fork of frequency 512 is sounded with a vibrating string of frequency 505.5 the beats produced per sec will be

The sound waves propagate in a metal bar may be

Tube A has both ends open while tube B has one end closed, otherwise they are identical. The ratio of fundamental frequency of tube A and B is

A tuning fork arrangement (pair) produces 4 beats/sec with the fork of frequency 288 cps. A little wax is placed on the unknown fork and it then produces 2 beats/sec. The frequency of the unknown fork is

A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of

A tunning fork P of frequency 512 Hz produces 6 beats per second with another tunning fork Q. When Q is slightly filed, the number of beats heard per second is 8. The original frequency of Q is

A sonometer wire supports a 4 kg load and vibrates in fundamental mode with a tunning fork of frequency 416 Hz. The length of the wire between the bridges is now doubled. In order to maintain fundamental mode, the load should be changed to

The frequency of a sonometer wire is 100 Hz.If the length of the string is doubled and the tension is changed, the new frequency becomes 75 Hz. The ratio of original and final tensions is

The sound wave of frequency 500 Hz covers a distance of 1000 m in 5s between the points X and Y. Then the number of waves between X and Y is

The temperature at which sound travels in hydrogen with the same velocity as in oxygen at 1000°C is

A string is divided into three segments, so that the segments possess fundamental frequencies in the ratio 1 : 2 : 3. Then the lengths of the segments are in the ratio

The frequency of B is 3% greater than that of A.The frequency of C is 2% less than that of A. If B and C produce 8 beats/s, then the frequency of A is

Two wires are kept tight between the same pair of supports. The tensions in the wires are in the ratio 2:1 , the radii are in the ratio 3:1 and the densities are in the ratio 1 : 2. The ratio of their fundamental frequencies is

If the amplitude of sound is doubled and the frequency reduced to one fourth, the intensity of sound at the same place will be

If a stone is dropped into a lake from a tower, the sound of splash is heard by a man after 11.5 s, then what is the height of tower?