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Physics

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

2
4
3
1

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Physics
Which of the following is optical illusion?

Earthshine
Mirage
Rainbow
Halo

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Physics
Who was the first scientist to discover Electrons?

Isaac Newton
J.C. Bose
J.J Thompson
Albert Einstein

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Physics
The modulus of rigidity is the ratio of

Longitudinal stress to longitudinal strain
Tensile stress to tensile strain
Shearing stress to shearing strain
Volume stress to volume strain

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Physics
Heat transfer horizontally within the atmosphere is called

Convection
Advection
Absorption
Conduction

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Physics
During hot weather, the fan produces a feeling of comfort. This is because

Our perspiration eva-porates rapidly
Fan supplies cool air
Conductivity of air increases
Fan cools the air

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