Answer available
Class 9 · Physics · Sound
What is an echo, and state two of its practical uses.
3 marksMediumShort answer
ICSE question bank
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8 questions
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Class 9 · Physics · Sound
Distinguish between infrasonic, audible and ultrasonic sound and give one use of ultrasound.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Sound
Define amplitude, frequency, wavelength and time period of a wave.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Sound
The speed of sound in air is 340 m s−1 and in water 1,480 m s−1. A sound of frequency 500 Hz passes from air into water. Find its wavelength in each.
3 marksMediumNumerical
- Answer available
Class 9 · Physics · Sound
What kind of wave is sound and why can it not travel through a vacuum?
2 marksEasyShort answer
- Answer available
Class 9 · Physics · Sound
Distinguish between a musical sound and a noise.
3 marksMediumShort answer
- Answer available
Class 9 · Physics · Sound
A sound wave has a frequency of 250 Hz and a wavelength of 1.32 m. Calculate its speed.
3 marksMediumNumerical
- Answer available
Class 9 · Physics · Sound
Why can sound not travel through a vacuum?
2 marksEasyShort answer