Consider the following numerical expression arising in a laboratory calculation: P =…

PHYSICS · Subjective · A Level · Physics · Measurements and their errors · Measurements and their errors

Problem

Consider the following numerical expression arising in a laboratory calculation: P=(3.42×102)(5.7×10−4)(2.11×101)÷(6.3×10−2).P = (3.42\times10^{2})(5.7\times10^{-4})(2.11\times10^{1}) \div (6.3\times10^{-2}). a) Evaluate PP without rounding at any intermediate stage and write it in scientific notation. b) Identify the number of significant figures permitted in the final answer on the basis of the given data. c) Round the value of PP obtained in part (a) to the correct number of significant figures and express it in standard scientific notation.

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