Given P = 0.0030 m,Q = 2.40 m,R = 3000 m. | vedclass

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(B) For $P = 0.0030 \ m$: Leading zeros are not significant. The digits $3$ and $0$ are significant. Thus,there are $2$ significant figures.For $Q = 2

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$2, 3, 1$

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(B) For $P = 0.0030 \ m$: Leading zeros are not significant. The digits $3$ and $0$ are significant. Thus,there are $2$ significant figures.For $Q = 2.40 \ m$: Trailing zeros in a decimal number are significant. Thus,there are $3$ significant figures.For $R = 3000 \ m$: In the absence of a decimal point,trailing zeros are generally not considered significant. Thus,there is $1$ significant figure.Therefore,the significant figures are $2, 3, 1$.

Given $P = 0.0030 \ m$,$Q = 2.40 \ m$,$R = 3000 \ m$. The significant figures in $P, Q$,and $R$ are respectively:

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