EASY
9th CBSE
IMPORTANT
Earn 100

Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.

Important Questions on Sound

MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Short Answer Type Questions>Q 55
Why are the ceilings of concert halls made curved? Draw a labeled diagram to illustrate your answer.
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Short Answer Type Questions>Q 56
Draw a labeled diagram to show the multiple reflection of sound in a part of the stethoscope tube.
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Short Answer Type Questions>Q 57

What is the range of frequencies associated with:

infrasound

EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Short Answer Type Questions>Q 57
What is the range of frequencies associated with:
audible sound
 
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Short Answer Type Questions>Q 57
What is the range of frequencies associated with:
ultrasound ?
MEDIUM
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Short Answer Type Questions>Q 58
What is the difference between infrasonic waves and ultrasonic waves?
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Short Answer Type Questions>Q 58
Choose the infrasonic waves and ultrasonic waves from the following frequencies:
(i) 10,000 Hz
(ii) 30,000 Hz
(iii) 18 Hz
(iv) 50,000 Hz
(v) 10 Hz
EASY
9th CBSE
IMPORTANT
Science for Ninth Class Part 1 Physics>Chapter 5 - Sound>Short Answer Type Questions>Q 59
What is the frequency range of hearing in humans?