can someone plz give me the numerical questions of physics of sound class 8th plz I didn't got from google so can someone plz send at least 10 questions
Answers
1) Lighting can be seen the moment it occurs. Paheli observes lighning in her area. She hears the sound 5 s after she observed lightining . How far is she from the place where lightning occurs? (speed of sound = 330 m/s).
2) A simple pendulum makes 10 oscillations in 20 seconds. What is the time period and frequency of its oscillations?
3) Calculate the wavelength of a sound wave whose frequency is 220 Hz and speed is 440 m/s in a given medium.
4) A person is listening to a tone of 500 Hz sitting at a distance of 450 m from the source of the sound. What is the time interval between successive compressions from the source?
5) An echo returned in 3 s. What is the distance of the reflecting surface from the source, given that the speed of sound is 342 m/s ?
6) A submarine emits a sonar pulse, which returns from an underwater cliff in 1.02 s. If the speed of sound in salt water is 1531 m/s, how far away is the cliff ?
HOPE THESE QUESTIONS HELP YOU !! : )