Question

Suppose you have two cubes of exactly the same volume. You weigh them and find a mass of 8.91g for one and 8.88g for the other cube even though they are made of the same material. How is this possible? ANSWER FAST

Answer 1

Explanation:

Mass of the cube -1 = 8.91 g

Mass of  the cube-2 = 8.88 g

Volume of the cube-1 = Volume of cube-2 = V

Density of the cube-1 = D

Density of cube-2 = D'

$Density=\frac{Mass}{Volume}$

$D=\frac{8.91 g}{V}$

$D'=\frac{8.88 g}{V}$

$\frac{D}{D'}=\frac{\frac{8.91 g}{V}}{\frac{8.88 g}{V}}=1.0033$

$D=1.0033\times D'$

Density directly depends upon mass of the substance and inversely depends upon volume of the substance.

Here volume of the both cubes are same but masses are different. So, in this case densities of both cubes can be compared on the basis of masses.

This difference in densities of same material can be due following possibles:

1. May be an impurity present in the one of the cubes for which they have given different values their mass.

2. Weighing may not be working well.

3. May be an air trapped inside in one of the cubes.

Answer 2

The two substances have different densities. Density can be affected by the temperature of a substance. Since they have to same volume but weigh differently, they have different densities. Remember, density = mass/volume