Chapter 10: Q43P (page 260)
(I)How fast does water flow from a hole at the bottom of a very wide, 4.7-m-deep storage tank filled with water? Ignore viscosity.
The speed of water flowing from the hole at the bottom is \(9.6\;{\rm{m/s}}\).
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(I)Show that Bernoulli’s equation reduces to the hydrostatic variation of pressure with depth (Eq. 10-3b) when there is no flow\(\left( {{v_1} = {v_2} = 0} \right)\).
An airplane has a mass of \({\bf{1}}{\bf{.7 \times 1}}{{\bf{0}}^{\bf{6}}}\;{\bf{kg}}\) and the air flows past the lower surface of the wings at 95 m/s. If the wings have a surface area of \({\bf{1200}}\;{{\bf{m}}^{\bf{2}}}\), how fast must the air flow over the upper surface of the wing if the plane is to stay in the air?
If one material has a higher density than another, must the molecules of the first be heavier than those of the second? Explain.
(I)Calculate the average speed of blood flow in the major arteries of the body, which have a total cross-sectional area of about \(2.0\;{\rm{c}}{{\rm{m}}^2}\). Use the data of Example 10–12.
Will an ice cube float in a glass of alcohol? Why or why not?
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