Chapter 5, Problem 55A

Interpretation Introduction

Interpretation: Among air, water, ethanol, or aluminum the densest substance is needs to be explained.

Concept Introduction: The given volume of matter contained in a material is termed as density. That is, it is mass per unit volume of an object:

  $\text{Density =}\frac{\text{mass}}{\text{volume}}$

Answer to Problem 55A

Aluminum is the densest substance.

Explanation of Solution

With increase in volume, density of the substance decreases. The increasing order of volume in solid liquid, and gas are as follows:

Gas>Liquid>Solid

And increasing density order is as follows:

Solid>Liquid>Gas

The density of air, water, ethanol, or aluminum is $0.00133,1,0.78,2.7$ respectively. From the above value it is clear that aluminum is densest among them.

Conclusion

Density of a substance is high if its volume is less than its mass.