Advertisements
Advertisements
Question
On which day, a hot day or a cold day, an echo is heard sooner ? Give reason for your answer.
Advertisements
Solution
An echo is heard sooner on a hot day because the speed of sound in air increases with increase in temperature of the propagating medium. Therefore, the speed of sound in air is faster on a hot day and thus echo is heard sooner.
APPEARS IN
RELATED QUESTIONS
A man is standing at a distance of 12 m from a cliff. Will he be able to hear a clear echo of his sound? Give a reason for your answer.
What is the other name of a loud-hailer ?
Name the device which is used to address a small gathering of people.
The speed of sound in water is 1500 metres per second. How far away from an under-sea rock should a deep sea diver be so that he can hear his own echo ?
What is meant by 'reflection of sound' ? What type of surfaces are the best for reflecting sound ?
A man standing 825 metres away from a cliff (steep rock) fires a gun. After how long will he hear its echo ? Speed of sound in air is 330 m/s.
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a bare room
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a furnished room
An echo-sounder in a trawler (fishing boat) receives an echo from a shoal of fish 0.4 s after it was sent. If the speed of sound in water is 1500 m/s, how deep is the shoal ?
______ allows bats to navigate through dark caves and find insects for food.
