Subject :NSO Class : Class 1
Subject :NSO Class : Class 4
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Subject :NSO Class : Class 3
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Subject :NSO Class : Class 6
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Subject :NSO Class : Class 7
Ans 1:
Class : Class 8
It should be A, it is clearly mentioned clock pendulum , it has a definite time period and can be used to measure time
Ans 2:
Class : Class 8
answer will be b because second statement is not correct explanation of first statement
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 4
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Subject :NSO Class : Class 8
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Subject :NSO Class : Class 7