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Physics Principles with Applications
Found in: Page 260
Physics Principles with Applications

Physics Principles with Applications

Book edition 7th
Author(s) Douglas C. Giancoli
Pages 978 pages
ISBN 978-0321625922

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Short Answer

Why do you float higher in salt water than in freshwater?

The density of salt water is higher than freshwater. The displaced water in salt is less than the fresh water. The buoyant force is higher in saltwater than the freshwater.

See the step by step solution

Step by Step Solution

Step 1: Understanding the application of Archimedes' principle in floatation

From the Archimedes principle, the displaced water weight must be equal to or less than the person’s weight. An upward force will be applied to the person’s body by the water.

Step 2: Explaining the reason for floating in saltwater higher than in freshwater

The density of salt water is comparatively higher than freshwater. So, the displaced water volume in the freshwater is higher than the displaced saltwater as the person will be displacing less salt water.

Then, the person will float more in the saltwater as compared to the freshwater.

Also, the buoyant force is more in saltwater. And less portion of the body will be submerged under the water.

Thus, the person will float more in salt water than in freshwater.

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