The reason why the diver will sink slightly when the diver exhales.
Explanation of Solution
Introduction:
In general, the things that float on liquid are less dense than that liquid.
When scuba divers take a breath means their body weight increases as compared to water displaced, thus, they sink towards the bottom, while when they exhale, some of the gases from their body goes out to the atmosphere and their body weight decreases as compared to water displaced thus, they float.
Conclusion:
Thus,this happens due to variations in densities.
Chapter 14 Solutions
Glencoe Physical Science 2012 Student Edition (Glencoe Science) (McGraw-Hill Education)
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