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प्रश्न
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a city
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उत्तर
The person would hear a lot of noise in heavy city traffic. Hence, he can conclude that he was in a city.
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संबंधित प्रश्न
Flash and thunder are produced simultaneously. But thunder is heard a few seconds after the flash is seen, why?
A stone is dropped from the top of a tower 500 m high into a pond of water at the base of the tower. When is the splash heard at the top? Given, g = 10 m s−2 and speed of sound = 340 m s−1.
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a village
Sunil is standing between two walls. The wall closest to him is at a distance of 660 m. If he shouts, he hears the first echo after 4 s and another after another 2 seconds.
- What is the velocity of sound in air?
- What is the distance between the two walls?
Write the formula for speed of sound in a gas using Laplace correction.
Numerical problem.
A stone is dropped from the top of a tower 750 m high into a pond of water at the base of the tower. Calculate the number of seconds for the splash to be heard? (Given g = 10 m s–2 and speed of sound = 340 m s–1)
A source of sound is travelling with a velocity 40 km/h towards an observer and emits a sound of frequency 2000 Hz. If the velocity of sound is 1220 km/h, then the apparent frequency heard by the observer is _____.
When temperature increases the speed of sound ______.
The speed of sound in a gaseous medium depends on the nature of the gas.
Numerical problems:
Two persons are at opposite ends of a steel rod. One strikes the end of the rod with a stone. Find the ratio of time taken by the sound wave in the air and in steel to reach the second person. (Sound of speed in steel = 5960 ms-1, Sound of speed in air = 344 ms-1).
