The mass of a box measured by a grocer’s balance is 2.30 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is (b) the difference in the masses of the pieces to correct significant figures ?
(b) Subtracting m 2 − m 1 = 0.02 g Since the initial mass has 4 significant digits, the result can have 4 or less significant digits Hence here the no. of significant digit = 2
