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Physics

Physics
Minimum number of unequal vectors which can give zero resultant are

three
two
more than four
four

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Physics
The focal length of a concave mirror with a radius of curvature of 20.0 cm is :

10 cm
5 cm
20 cm
15 cm

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Physics
What is unit of Viscosity ?

Watt per meter per degree celcius
Joule per kilogram per Kelvin
Newton second per square meter
Coulomb

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Physics
The absolute zero is a temperature at which ________

Molecular motion in a gas would cease
All gases become liquid
Water freezes
All gases become solid

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Physics
Why does ice covered in sawdust not melt quickly ?

Sawdust is good conductor of heat
Sawdust is a bad conductor of heat
The water is absorbed by sawdust
Sawdust does not allow the air to touch the ice

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Physics
Who among the following is credited for the Corpuscular theory of light?

James Clerk Maxwell
Albert Einstein
Isaac Newton
Christiaan Hyugens

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