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Question

A force is equal to 85.75 dyne. If it is expressed in Newton, then the number of significant figures will be

A
6
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B
5
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C
3
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D
4
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Solution

The correct option is D 4
We know that, 1 dyne=105 N.
So, 85.75 dyne=85.75×105 N
Also, we know that change in prefixes of unit does not change the number of significant figures.
Thus, the total number of significant figure will be 4.

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