Physics
Ice cubes are added to a glass of pure water and a glass of pure alcohol. The ice would be

At the same level in both
Floating in alcohol and sinking in water
At a higher level in alcohol
At a higher level in water

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Physics
Inside an aeroplane, flying at a high altitude,

normal humidity and partial vacuum are maintained.
the pressure is the same as that outside.
normal atmospheric pressure is maintained by the use of air pumps.
the pressure inside is less than the pressure outside.

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Physics
Circuit breaker usually operate under

Transient state of short-circuit current
Steady state of short-circuit current
Sub-transient state of short-circuit current
After D. C. component has ceased

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