Physics

Question 3 2 pts A rectangular concrete floor is measured. Its length is 4.3 m + 0.5 m and its width is 3.4 m + 0.4 m. Calculate the absolute uncertainty of the perimeter of the floor in metres correct to one DECIMAL PLACE. Question 4 2 pts Anna, Anh and Amir are each given a sample of an unknown polymer and asked to calculate the density of their sample to determine if it could be polyaniline. They find a published value for the density of polyaniline to be 1.33 g cm-3. Anh measures the mass of his sample to be 57.9 + 0.4 g and the volume of his sample to be 41.2+ 0.4 cm3. Express the absolute uncertainty in the density of Anh's sample in grams per cubic centimetre, to TWO significant figures