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A steel meter scale is to be ruled so that millimeter intervals are accurate within about  at a certain temperature. The maximum temperature variation allowable during the ruling is (Coefficient of linear expansion of steel  )

1)

2)

3)

4)


Question ID - 100393 :-

A steel meter scale is to be ruled so that millimeter intervals are accurate within about  at a certain temperature. The maximum temperature variation allowable during the ruling is (Coefficient of linear expansion of steel  )

1)

2)

3)

4)

1 Answer
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Answer Key : (2) -

As we know



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A strip of wood of mass  and length  is placed on a smooth horizontal surface. An insect of mass starts at one end of the strip and walks to the other end in time  moving with a constant speed. The speed of the insect as seen from the ground is

a)

b)

c)

d)


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