Subtract 0.2 J from 7.26 J and express the result with correct number of significant figures.

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7.1 J

7.06 J

7.0 J

7 J

answer is A.

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Detailed Solution

Subtraction is correct upto one place of decimal, corresponding to the least number of decimal places. 7.26 -0.2 = 7.06 = 7.1J.

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