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PHYSICS

Physics
Sound is heard over longer distances on rainy days because

Sound travels slowly in moist air
Moist air absorbs sound
Moist air does not absorb sound
Sound travels faster in moist air

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Physics
Which phenomenon is responsible for the echo of sound wave?

Refraction
Polarisation
Reflection
Interference

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Physics
Loudness of sound depends on

Amplitude
Pitch
Wavelength
Frequency

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Physics
Which one of the following animals can hear ultrasonic sound ?

Bat
Cat
Squirrel
Rat

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Physics
The instrument which uses sound waves to measure the depth of oceans is

Radar
Sonar
Altimeter
Venturimeter

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