What is an echo?

Important Questions on Sound

EASY

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 7 - Sound>QUESTIONS>Q 11

Show that the minimum distance to observe a distinct echo is $17 \mathrm{m}$.

MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 7 - Sound>QUESTIONS>Q 12

Can echo be produced in water? If your answer is yes, what should be the least distance of reflector in water?

EASY

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 7 - Sound>QUESTIONS>Q 13

A man shouts and hears the echo of sound from a distant hill after 1.4 second. What is the distance of hill from man? Velocity of sound in air$=340 \mathrm{m} {\mathrm{s}}^{-1}.$

MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 7 - Sound>QUESTIONS>Q 14

A man is standing between two vertical cliffs $685 \mathrm{m}$ apart. He claps his hands and hears two distinct echoes after $0.9 \mathrm{second}$ and $1.1 \mathrm{seconds}$ respectively. What is the speed of sound in air?

MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 7 - Sound>QUESTIONS>Q 15

What do you mean by the reverberation of sound? Give one practical example.

EASY

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 7 - Sound>QUESTIONS>Q 16

What do you mean by the term SONAR?

MEDIUM

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 7 - Sound>QUESTIONS>Q 17

What is sound ranging? Give one example.

EASY

10th ICSE

IMPORTANT

S CHAND'S ICSE PHYSICS BOOK 2>Chapter 7 - Sound>QUESTIONS>Q 18

A ship sends ultrasonic waves in all directions. A particular wave reflects from the rock inside sea in $4.6 \mathrm{seconds}$. What is the distance of the rock from ship? Velocity of sound in water $=1450 \mathrm{m} {\mathrm{s}}^{-1}$.