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Physics

Physics
In the absence of ozone layer, which rays will enter into atmosphere?

X-rays
Infrared
Ultraviolet
Visible

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Physics
The type of mirror used in automobiles to see the traffic on the rear side is

Plane
Convex
Plano-Convex
Concave

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Physics
The size of gear is usually specified by

Circular pitch
Pitch circle diameter
Pressure angle
Diametral pitch

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Physics
The instrument used to measure the speed of the wind is

Chronometer
Anemometer
Altimeter
Dosimeter

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Physics
Where does hydroelectric energy come from?

Solar
All of these
Water
Air

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Physics
When a vehicle passes, TV reception gets distorted. This is because

Vehicle pollution affects the performance of the TV components
Spark plug creates electromagnetic disturbances
Modern vehicles use electroignition system
Metal reflects radiowaves

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