Question

The mass of a box measured by a grocer's balance is 2.300kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is (a) the total mass of the box, (b) the difference in the masses of the pieces to correct significant figures?

Answer 1

Here is your answer:

Explanation:

As per given data

Mass of the box = 2.3 Kg

Mass of piece 1 = 20. 15 g = 0.02015 kg

mass of piece 2 = 20.17 g = 0.02017 kg

Solution:

Total mass of the box

= 2.3 + 0.02015 + 0.02017

= 2.34032 kg

= 2.3 kg

What is difference in the masses?

= 20.17 – 20.15

= 0.02 g

Answer 2

Brainly Answer:-

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Mass of box = 2.3 Kg

$Mass \: of \: 1 ^{st} \: piece \: = 20.15g \: = \: \frac{20.15}{1000} = 0.02015kg$

$Mass \: of \: 2 ^{nd} \: piece \: = 20.17g \: = \: 0.02017 \: kg$

$\:Total \: Mass \: = \: 2.3 \: + \: 0.02015 \: + \: 0.0201 \\ = \: 2.32032 \: kg \\ = 2.3 \: kg$

Now,

$Difference \: of \: mass \: = 20.17 \: - \: 20.15 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \: 0.02 \: g$