Sound Test - 2...

Sound waves travel through sea water at about 1500 m/s. What frequency would generate a wavelength of 1.25 m in sea water?

Two sound waves, travelling in the same medium, have time periods in the ratio 2 : 3. What is the ratio of their speeds?

Two sounds A and B are of frequencies f and 2f, respectively. Which of the following is correct?

A person clapped his hands near a cliff and heard the echo after 3 s. What is the distance of the cliff from the person if the speed of the sound (v) is 346 ms^-1?

How can we reduce reverberation in an auditorium?

An echo is returned in 0.4 s. What is the distance of the reflecting surface from the source of sound?
(Take speed of sound = 344 ms^-1)

Which of the following statements is incorrect?

Bats can fly in the dark without hitting anything because

Ultrasonic waves are made to reflect from various parts of the heart and form the image of the heart. What is this technique called?

A wavelength of 0.60 cm is produced in air and it travels at a speed of 320 ms^-1.Which wave will it be?