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Chapter 12: Q3CQ (page 425)
Identify some substances that are incompressible and some that are not.
Oil in hydraulic brakes is incompressible. Gases under normal conditions are compressible.
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(a) Estimate the time it would take to fill a private swimming pool with a capacity of 80,000 L using a garden hose delivering 60 L/min. (b) How long would it take to fill if you could divert a moderate size river, flowing at \({\bf{5000}}\;{{\bf{m}}^{\bf{3}}}{\bf{/s}}\), into it?
Roofs are sometimes pushed off vertically during a tropical cyclone, and buildings sometimes explode outward when hit by a tornado. Use Bernoulli鈥檚 principle to explain these phenomena.
Why does flow decrease in your shower when someone flushes the toilet?
You can squirt water a considerably greater distance by placing your thumb over the end of a garden hose and then releasing, than by leaving it completely uncovered. Explain how this works.
Why does a sailboat need a keel?
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