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question_answer1) Sound cannot travel in
question_answer2) If the velocity of sound air at \[{{0}^{o}}C\] is 332 m/s, its velocity at \[{{30}^{o}}C\] is
question_answer3) An echo is heard after 0.8 s, when a person fires a cracker 132.8 m from a high building. What is the speed of sound?
question_answer4) A man stands in between two cliffs and explodes a cracker. He hears the first echo after 0.6s and the second echo after 2.4s. Calculate the distance between the cliffs, (speed of sound = 336 m/s)
question_answer5) A dog barks in a park and hears its echo after 0.5 second. If the sound of its bark got reflected by a nearby building, find the distance between the dog and the building. Take the speed of sound in air is 346 m/s.
question_answer6) A ship sends a signal and receives it back from the bottom of the sea after 6s. What is the depth of the sea at that place? (speed of sound in sea water is \[1450\text{ }m{{s}^{-1}}\])
question_answer7) Using the sonar, sound pulses are emitted at the surface, the pulses after being reflected from the bottom are detected, if the time interval from the emission to the detection of the sound pulses is 2 seconds, find the depth of the water. (Taking velocity of sound through water = 1531 m/s)
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