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Chapter 10: Q2P (page 260)
(I) What is the approximate mass of air in a living room 5.6脳 3.6脳 2.4m?
The mass of the air is 62.4 Kg.
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A copper (Cu) weight is placed on top of a 0.40-kg block of wood (\({\bf{density = 0}}{\bf{.60 \times 1}}{{\bf{0}}^{\bf{3}}}\;{\bf{kg/}}{{\bf{m}}^{\bf{3}}}\) ) floating in water, as shown in Fig. 10鈥�58. What is the mass of the copper if the top of the wood block is exactly at the water鈥檚 surface?
Figure: 10-58
(II) A house at the bottom of a hill is fed by a full tank of water 6.0 m deep and connected to the house by a pipe that is 75 m long at an angle of 61掳 from the horizontal (Fig. 10鈥�49). (a) Determine the water gauge pressure at the house. (b) How high could the water shoot if it came vertically out of a broken pipe in front of the house?
(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鈥�12.
A beaker of water rests on an electronic balance that reads 975.0 g. A 2.6-cm-diameter solid copper ball attached to a string is submerged in the water, but does not touch the bottom. What are the tension in the string and the new balance reading?
(II) A \({\rm{0}}{\rm{.48 kg}}\)piece of wood floats in water but is found to sink in alcohol \(\left( {SG = 0.79} \right)\), in which it has an apparent mass of\({\rm{0}}{\rm{.047 kg}}\). What is the SG of the wood
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