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The pressure is the same as that outside
The pressure inside is less than the pressure outside
Normal atmospheric pressure is maintained by the use of air pumps
Normal humidity and partial vacuum are maintained
Instrument used to measure the force and velocity of the wind is
Intensity of gravitational field of earth is max. at
Is a mirror always forming an erect image of a real object?
Isotopes of an element contain
It is dangerous to observe Solar eclipse with naked eyes as
It is dangerous to observe Solar eclipse with naked eyes because
It is difficult to cook rice
It is difficult to fix a nail on a freely suspended wooden frame. Which law supports this statement?
It is easier for a man to swim in sea water, than in river water because
It is easier to carry two buckets of water in one hand each, than to carry only one in one hand as