A uniform metre scale is pivoted from 0cm mark and is free to rotate in vertical plane. a 50g weight is suspended from the 20cm mark on the scale. calculate the answer in nm
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A micrometer has 150 equal divisions on the circular
scale, and on one full rotation of circular scale main
scale advances by 0.02 cm on the main scale. The least
count of the micrometer (in cm) is
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