MEDIUM
9th West Bengal Board
IMPORTANT
Earn 100

Distinguish between compression and rarefaction.

Important Questions on Sound

MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 7 - Sound>EXERCISE>Q 3.5.
What is the difference between the reflection of sound and the reflection of light?
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 7 - Sound>EXERCISE>Q 3.6.
What is a megaphone? How does it work?
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 7 - Sound>EXERCISE>Q 3.7.
Why a male voice is different from a female voice?
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 7 - Sound>EXERCISE>Q 3.8.
What are ultrasonic sounds? How bats use that to catch prey?
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 7 - Sound>EXERCISE>Q 3.9.
How the speed of sound is affected by the direction of moving wind?
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 7 - Sound>EXERCISE>Q 3.10.
Why do we not hear echo at all places?
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 7 - Sound>EXERCISE>Q 4.1.
What are the characteristics of wave motion?
MEDIUM
9th West Bengal Board
IMPORTANT
PHYSICAL SCIENCE & ENVIRONMENT CLASS 9>Chapter 7 - Sound>EXERCISE>Q 4.2.
Write down the process of echolocation done by the bats. What is the tone?