MEDIUM
9th CBSE
IMPORTANT
Earn 100

Why are the ceilings of concert halls made curved?

Important Questions on Sound

MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 5 - Sound>Exercise>Q 8
Give two uses of ultrasound in industry and in hospitals.
MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 5 - Sound>Exercise>Q 9
Explain how the bats use ultrasonic waves to catch the prey.
EASY
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 5 - Sound>Exercise>Q 10
Name the three tiny bones present in the middle part of the ear.
EASY
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 5 - Sound>Exercise>Q 11
What is the function of three tiny bones in the ear?
EASY
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 5 - Sound>Exercise>Q 12
Why should we not put a pointed object in our ears?
EASY
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 5 - Sound>Exercise>Q 13

Raj noticed that his pet dog was frightened and trying to hide in safe place in his house when some crackers were burst in the neighbourhood. He realized the problem and he decided not to burst crackers during diwali or for any other celebrations.
What must be the range of crackers sound?

 

MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 5 - Sound>Exercise>Q 13

Raj noticed that his pet dog was frightened and trying to hide in safe place in his house when some crackers were burst in the neighbourhood. He realized the problem and he decided not to burst crackers during diwali or for any other celebrations.

Name two diseases that can be caused due to noise pollution.

MEDIUM
9th CBSE
IMPORTANT
Physics For Class 9>Chapter 5 - Sound>Exercise>Q 13
Raj noticed that his pet dog was frightened and trying to hide in safe place in his house when some crackers were burst in the neighbourhood. He realized the problem and he decided not to burst crackers during diwali or for any other celebrations.

Name the values of Raj reflected in above act.