Question

Which of the following are the least dense materials shown?

Answer 1

Answer: Option (c) is the correct answer.

Explanation:

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

                $\rho$ = $\frac{mass}{volume}$

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

The density of rock is calculated as follows.

                       $\rho$ = $\frac{mass}{volume}$

                                   = $\frac{1000g}{0.5 L}$

                                   = 200 g/L

The density of pillow is calculated as follows.

                           $\rho$ = $\frac{mass}{volume}$

                                = $\frac{200g}{10 L}$

                                = 20 g/L

The density of bottle of soda is calculated as follows.

                         $\rho$ = $\frac{mass}{volume}$

                               = $\frac{2000g}{2 L}$

                               = 1000 g/L

The density of loaf of bread is calculated as follows.

                       $\rho$ = $\frac{mass}{volume}$

                               = $\frac{100g}{1 L}$

                               = 100 g/L

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

Answer 2

The CORRECT ANSWER is A. "Loaf of Bread and Rock" Remember they might switch the answers so remember ^ is the right answer. Your welcome. : )