HARD
8th Chhattisgarh Board
IMPORTANT
Earn 100

An object completes 20 oscillations in ten seconds. Find its frequency and time period.

Important Questions on Sound

MEDIUM
8th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VIII>Chapter 10 - Sound>NOW ANSWER THESE>Q 1
On the surface of the moon why can the voice of an astronaut not be heard by the other astronaut standing nearby?
EASY
8th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VIII>Chapter 10 - Sound>NOW ANSWER THESE>Q 2
Who was the first to suggest that a medium is needed for the propagation of sound?
MEDIUM
8th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VIII>Chapter 10 - Sound>NOW ANSWER THESE>Q 1
Write the difference between audible and ultrasonic sounds.
EASY
8th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VIII>Chapter 10 - Sound>NOW ANSWER THESE>Q 3
Write the audible range of normal human beings.
MEDIUM
8th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VIII>Chapter 10 - Sound>NOW ANSWER THESE>Q 1
Give the two examples each for sounds with a high pitch and with a low pitch.
MEDIUM
8th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VIII>Chapter 10 - Sound>NOW ANSWER THESE>Q 2
What kind of sound is produced when vocal cords are thin and stretched?
MEDIUM
8th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VIII>Chapter 10 - Sound>NOW ANSWER THESE>Q 3
How do birds, fishes and flies produce sound?
EASY
8th Chhattisgarh Board
IMPORTANT
Science & Technology Class - VIII>Chapter 10 - Sound>QUESTIONS FOR PRACTICE>Q 1
The range of audible frequencies for human beings is-