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Physics

Physics
The minimum number of geostationary satellites needed for uninterrupted global coverage is :

2
4
1
3

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Physics
The layer of atmosphere used for radio-wave transmission is

Troposphere
Stratosphere
Chromosphere
Ionosphere

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Physics
Atomic hydrogen has a life period of

One day
One minute
A fraction of a second
One hour

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Physics
Which one of the following is a non-dimensional quantity?

Strain
Co-efficient of viscocity
Gas constant
Plank's constant

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Physics
The velocity of sound is more in

Water
Steel
Wood
Air

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Physics
Which of the following liquids has the least density ?

Petrol
Mercury
Salt water
Fresh water

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