Exercises

Author:Jharkhand Board

Jharkhand Board Science Solutions for Exercises

Simple step-by-step solutions to Exercises questions of Sound from Science: Class IX. Also get 3D topic explainers, cheat sheets, and unlimited doubts solving on EMBIBE.

Questions from Exercises with Hints & Solutions

EASY
9th Jharkhand Board
IMPORTANT
Science: Class IX>Chapter 12 - Sound>Exercises>Q 15

What is reverberation? How can it be reduced?

EASY
9th Jharkhand Board
IMPORTANT
Science: Class IX>Chapter 12 - Sound>Exercises>Q 16

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

EASY
9th Jharkhand Board
IMPORTANT
Science: Class IX>Chapter 12 - Sound>Exercises>Q 17

Explain how bats use ultrasound to catch a prey.

EASY
9th Jharkhand Board
IMPORTANT
Science: Class IX>Chapter 12 - Sound>Exercises>Q 18

How is ultrasound used for cleaning?

MEDIUM
9th Jharkhand Board
IMPORTANT
Science: Class IX>Chapter 12 - Sound>Exercises>Q 19

Explain the working and application of a sonar.

MEDIUM
9th Jharkhand Board
IMPORTANT
Science: Class IX>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 Jharkhand Board
IMPORTANT
Science: Class IX>Chapter 12 - Sound>Exercises>Q 21

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

MEDIUM
9th Jharkhand Board
IMPORTANT
Science: Class IX>Chapter 12 - Sound>Exercises>Q 22

Explain how the human ear works.