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General Science for Class 7
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Sound Waves
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Sound Waves
The distance between two points of a wave in a phase is known as
wave front
frequency
amplitude
wavelength
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Sound Waves
The pleasant sound of music depends on its
amplitude
frequency
wavelength
volume
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Sound Waves
“Ultrasound” can
break up kidney stones
destroy the kidney stones
stimulate the growth of kidney stones
clot blood in the kidneys
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Sound Waves
When sound travels, it
absorbs energy
gains energy
loses energy
transfers energy
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Sound Waves
The most important characteristic of a ‘music’ is its
bass effect
harmony
rhythm
scale
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Sound Waves
In concert halls, soft materials and carpets are used to
increase sound waves
absorb sound waves
retract sound waves
refract sound waves
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Sound Waves
As we turn older, our ears get
less sensitive to low pitched sound
more sensitive to low pitched sound
less sensitive to high pitched sound
more sensitive to high pitched sound
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Sound Waves
‘Eardrum’ bursts at
40 dB
80 dB
160 dB
320 dB
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Sound Waves
As compare to air, sound travels faster in
liquids
gases
vacuum
fluids
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Sound Waves
When two or more notes with different pitches are sounded together,
disco is created
peace is created
harmony is created
beat is created
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