Question

Which of the following are the least dense materials shown?

Rock- 1000g, 0.5L(liters)

Pillow- 200g, 10L(liters)

Bottle of soda- 2000g, 2L(liters)

Loaf of bread- 100g, 1L(liter)



loaf of bread and rock?

rock and bottle of soda?

loaf of bread and pillow?

bottle of soda and loaf of bread?

Answer 1

Answer: Option (c) is the correct answer.

Step-by-step explanation:

Density is the measure of mass per liter of volume. The formula to calculate density is as follows.

`\rho` =
`(mass)/(volume)`

A substance with less density is the least dense and vice versa.

The density of rock is calculated as follows.

`\rho` =
`(mass)/(volume)`

=
`(1000g)/(0.5 L)`

= 200 g/L

The density of pillow is calculated as follows.

`\rho` =
`(mass)/(volume)`

=
`(200g)/(10 L)`

= 20 g/L

The density of bottle of soda is calculated as follows.

`\rho` =
`(mass)/(volume)`

=
`(2000g)/(2 L)`

= 1000 g/L

The density of loaf of bread is calculated as follows.

`\rho` =
`(mass)/(volume)`

=
`(100g)/(1 L)`

= 100 g/L

Thus, we can conclude that loaf of bread and pillow are the least dense materials shown.