MEDIUM
8th CBSE
IMPORTANT
Earn 100

Sound vibrations die out after travelling some distance due to the loss of .(Energy/Force)

70.57% studentsanswered this correctly

Important Questions on Sound

EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D
Sound needs a _____to travel.
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D
Industrial noise can be reduced by proper _____ (maintenance/cooling).
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q D

The reflecting surface has to be at least _____ metres away for us to hear an echo distinctly. 

Choose from the following: 10.4, 17.2, 22.2

EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q E
What helps us distinguish between the same note of the same loudness produced by two musical instruments?
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q E
The frequencies of harmonics are
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q E
Sound travels :
MEDIUM
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q E
The decibel is a unit that measures
EASY
8th CBSE
IMPORTANT
Basic Science for Class 8>Chapter 9 - Sound>Exercises>Q E
Women are more high-pitched than men because their vocal cords