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Physics

Physics
Pa(Pascal) is the unit for

Pressure
Conductivity
Thrust
Frequency

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Physics
Why do birds not have respiratory trouble at the time of flying at high altitude ?

Their lungs are very large
They have extra air sacs
They fly inactively
They use less oxygen

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Physics
Which one of the following is a good electrical conductor?

Graphite
Peat
Charcoal
Diamond

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Physics
Longitudinal waves cannot travel through

Liquid
Gas
Vacuum
Solid

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Physics
Which of the following represents a relation for ''heat lost = heat gained'?

Principle of calorimetry
Principle of colors
Principle of vaporization
Principle of thermal equilibrium

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

20 cm
15 cm
10 cm
5 cm

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