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Physics

Physics
Calculate the time period (in seconds) of a sound wave of wavelength 4m traveling with a speed of 500m/s

0.016
1000
0.008
2000

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Physics
In hydro power station, the motion produced in turbines is due to

Burning of diesel
Flow of water
Production of steam
Burning of coal

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Physics
The velocity of falling rain drops attains a terminal value because of

Viscous force exerted by air
Air current
Surface tension
Upward thrust due to air

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Physics
It is more difficult to walk on ice than on a concrete road because

There is more friction between the ice and feer
There is very little friction between the ice and feet pressing it
Ice is soft when compared to concrete
None of these

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Physics
The locomotion of insects to the source of light is called :

Phototactic
Hydrotropic
Phototropic
Thermotactic

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Physics
Convex mirror is generally used in ________

Rear view mirror
Solar cookers
Reflector for head light
Opthalmoscope

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