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Q. Which one of the following is the most accurate method for determining the age of crust of the earth?
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Q. The frequency used in TV and radar system lies in
Q. After long periods of use, a grey spot develops on the inside of a bulb. This is because
Q. Which of the following is not a part of a CRT ?
Q. An electrical appliance is earthed to
Q. Shock-absorbers are usually made of steel as it
Q. Heat from the sun reaches earth by the process of
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