Advertisements
Advertisements
Question
A man is kidnapped, blindfolded and imprisoned in a big room. How could the man tell if he was in : a bare room
Advertisements
Solution
The person would hear echoes when talking in a bare room.
APPEARS IN
RELATED QUESTIONS
Does sound follow the same laws of reflection as light does? Explain.
On which day, a hot day or a cold day, an echo is heard sooner ? Give reason for your answer.
Why do we hear more clearly in a room with curtains than in a room without curtains ?
Why are the ceilings of concert halls made curved ? Draw a labelled diagram to illustrate your answer.
The echo of a sound is heard after 5 seconds. If the speed of sound in air be 342 m/s, calculate the distance of the reflecting surface.
The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea by the echo method ?
Explain by giving a scientific reason.
We cannot hear the echo produced in a classroom.
A man is standing between two vertical walls 680 m apart. He claps his hands and hears two distinct echoes after 0.9 seconds and 1.1 seconds respectively. What is the speed of sound in the air?
What is an echo?
How can you calculate the speed of sound using echo?
