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Sound Waves
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General Science for Class 7
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Sound Waves
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Sound Waves
If a tuning fork makes a single musical note, it will produce
a wave
a frequency
a wave front
an amplitude
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Sound Waves
A long thick tube produces
low note
high note
deep note
low pitched note
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Sound Waves
The speed of sound in wood is
2000 m/s
3000 m/s
4000 m/s
5000 m/s
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Sound Waves
The caliber of instrumental note depends on the
depth of drum
string length
length of wind holes
radius of wind holes
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Sound Waves
Sounds of dead leaves and cats are known as
loud sounds
soft sounds
high pitched sounds
low pitched sounds
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Sound Waves
If frequency is high, the peak of the waves would be
uneven
closer
distant
even
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Sound Waves
Sound travels faster in liquids than air because
liquid is more dense
the particles in liquid are close
the particles in liquids have less energy
the particles in liquids collide less as compare to particles in air
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Sound Waves
A device for viewing oscillations by a display on the screen of a cathode ray tube is called
telescope
microscope
oscilloscope
stethoscope
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Sound Waves
In water the speed of sound is
100 m/s
200 m/s
1500 m/s
2000 m/s
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Sound Waves
Three main types of musical instruments are
guitar, violin and piano
drum, guitar and piano
stringed instrument, wind instrument and percussion instrument
stringed instrument, wind instrument and beat n bass instrument
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