Question

You are working on the analysis of rocks brought back from the Moon and find that one rock whose mass in 8.20 kg has an apparent mass of 6.18 kg when submerged in water. What is the density of the rock?

Answer 1

Answer:

The correct answer is 1.33 $\frac{kg}{L}$.

Explanation:

The mass of the rock is 8.20 kg. To know its density we must first know its volume. By immersing it in water, we can calculate the volume of water dislodged through the density of the water and the mass. The apparent mass of the object is 6.18 kg. If we divide this value by the density of the water we will obtain the volume of the rock.

V = $\frac{6.18 kg}{1\frac{kg}{L} }$

V = 6.18 L

Now we can calculate the density (δ) of the object by knowing its mass and volume.

δ = $\frac{8.20 kg}{6.18 L}$

δ = 1.33 Kg / L

Have a nice day!