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Q. Why a weather balloon is not fully inflated on the ground?
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Q. A hydrogen balloon floats up as of
Q. Refraction of star light through the earth’s atmosphere causes
Q. Minimum number of unequal vectors which can give zero resultant are
Q. The amount of matter in a ball of steel is its :
Q. Which one of the expression satisfies the condition of maximum power transfer theorem ?
Q. A single fixed pulley is used to draw water from a well as
Q. The enormous energy released in an atomic explosion is due to the
Q. Atomic number of an atom gives the number of which of the following -
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