The side of a square aluminium plate is measured to be

PHYSICS · Subjective · CBSE · Physics · Units and Measurements · Units and Measurements

Problem

s = 12.4\,\text{cm} \pm 0.1\,\text{cm}

. The plate is used as a reference area in a laboratory experiment. (a) Calculate the area

A

of the plate. (b) Determine the absolute uncertainty in the calculated value of

A

. (c) Express the final value of the area with its uncertainty using the correct number of significant figures.