Punjab Board Solutions for Chapter: Sound, Exercise 11: Exercises

Author:Punjab Board

Punjab Board Science Solutions for Exercise - Punjab Board Solutions for Chapter: Sound, Exercise 11: Exercises

Attempt the free practice questions on Chapter 12: Sound, Exercise 11: Exercises with hints and solutions to strengthen your understanding. Science solutions are prepared by Experienced Embibe Experts.

Questions from Punjab Board Solutions for Chapter: Sound, Exercise 11: Exercises with Hints & Solutions

EASY
9th Punjab Board
IMPORTANT
Science>Chapter 12 - Sound>Exercises>Q 15

What is reverberation? How can it be reduced?

EASY
9th Punjab Board
IMPORTANT
Science>Chapter 12 - Sound>Exercises>Q 16

What is loudness of sound? What factors does it depend on?

EASY
9th Punjab Board
IMPORTANT
Science>Chapter 12 - Sound>Exercises>Q 17

Explain how bats use ultrasound to catch a prey.

EASY
9th Punjab Board
IMPORTANT
Science>Chapter 12 - Sound>Exercises>Q 18

How is ultrasound used for cleaning?

MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 12 - Sound>Exercises>Q 19

Explain the working and application of a sonar.

MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 12 - Sound>Exercises>Q 20

A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.

MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 12 - Sound>Exercises>Q 21

Explain how defects in a metal block can be detected using ultrasound.

MEDIUM
9th Punjab Board
IMPORTANT
Science>Chapter 12 - Sound>Exercises>Q 22

Explain how the human ear works.