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Q. Rocket works on the principle of
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Q. Generally radar is used for
Q. The fundamental scientific principle in the operation of battery is
Q. Eclipses occur due to which optical phenomena -
Q. Detergents clean surfaces on the principle of
Q. Metal are good conductors because
Q. Which one of the following is a physical change?
Q. The work done in holding a weight of 20kg at a height of 1m above the ground is
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