Question

28. A piece of cork of mass 20 g has a volume of 50 cm. Find the density of cork in :
(a) CGS system
(b) SI system​

Answer 1

Answer:

(a) 0.4g/cm3

(b) 400

Explanation:

Given v= 50cm3, m=20g

(a) d=m/v=20/50=0.4g/cm3

(b) v=50cm3=50×10-6cm3

m= 20/1000=2×10-2kg

d=m/v= 2×10-2/50×10-6=2000/5=400

hope it will help you !!

Answer 2

Given

$v \: = \: 50 {cm}^{3}$

$m \: = \: 20g$

The density of cork in :

(a) CGS system

$d \: = \: \frac{m}{v}$

$d \: = \frac{20}{50} \: = \: 0.4g \: {cm}^{3}$

b) SI system

$v \: = \: 50 \: {cm}^{3} = 50 \: \times \: {10}^{ - 6} \: {m}^{3}$

$m \: = \: 20gm \: = 2 \: \times \: {10}^{ - 2} kg$

$d \: = \: \frac{m}{v}$

$d \: = \: \frac{2 \: \times \: {10}^{ - 2 \: kg} }{50 \: \times \: {10}^{ - 6} {m}^{3} }$

$d \: = \: 400 \: kg \: {m}^{ - 3}$