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Q. Speed of sound in a gas is proportional to
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Q. The heaviest naturally occurring element is:
Q. X - rays are used for the study of crystal structure because
Q. Which layer of the atmosphere is responsible for reflecting radio waves to the earth?
Q. The fundamental scientific principle in the operation of battery is
Q. A periscope works on the principle of
Q. When cream is separated from milk, density of milk
Q. It is more difficult to walk on a sandy road than on a concrete road because
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