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Q. Sound of frequency below 20 Hz are called
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Q. A piece of wood is held under water. The upthrust on it will be:
Q. Which one of the following is not a chemical change?
Q. The sudden fall of atmospheric pressure indicates
Q. Why does'nt the hydrogen atom emit X-rays?
Q. Weight of a body is maximum at the:
Q. Which of the following is a non renewable source of energy ?
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