<p><strong>Fig. 9.12.</strong> Testing how pressure changes affect the volume of (<strong>A</strong>) air, (<strong>B</strong>) water, and (<strong>C</strong>) an air-water system.</p>

Fig. 9.12. Testing how pressure changes affect the volume of (A) air, (B) water, and (C) an air-water system.

Image by Byron Inouye