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assignment class 11 - physical world and measurement

1             (1)   Find the area of circle of radius 3.458cm up to correct significant figures.
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               (2)The wavelength ‘λ’ depends mass M of the moving particle its velocity v and planks                           constant  ‘h’ . Show the relationship between them.
               
              (3)To determine acceleration due to gravity ,the time of 20 oscillations of a simple                           pendulum of   length 100 cm was observed to be 40 s . calculate the value of ‘g’ and                   maximum percentage error in the measured value  of ‘g’ .
              

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