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Physics / College Physics 1 / Chapter 11 / Problem 35

College Physics | 1st Edition | ISBN: 9781938168000 | Authors: Paul Peter Urone, Roger Hinrichs

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Birds such as ducks, geese, and swans have greater

Chapter 11, Problem 35

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QUESTION:

Problem 35CQ

Birds such as ducks, geese, and swans have greater densities than water, yet they are able to sit on its surface. Explain this ability, noting that water does not wet their feathers and that they cannot sit on soapy water.

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QUESTION:

Problem 35CQ

Birds such as ducks, geese, and swans have greater densities than water, yet they are able to sit on its surface. Explain this ability, noting that water does not wet their feathers and that they cannot sit on soapy water.

ANSWER:

Solution

Step 1

We know that buoyancy force is the force responsible for an object to float over a liquid and it depends on the density of the liquid and the object. That is the object’s density should be less compared to the liquid density to float over the water.

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