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Chapter 10: Q3P (page 260)
(I) If you tried to smuggle gold bricks by filling your backpack, whose dimensions are 54cm× 31cm× 22cm what would its mass be?
The mass of the gold bricks is 710.78Kg.
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(II) How high would the level be in an alcohol barometer at normal atmospheric pressure?
(II)What is the lift (in newtons) due to Bernoulli’s principle on a wing of area\(88\;{{\rm{m}}^2}\)if the air passes over the top and bottom surfaces at speeds of 280 m/s and 150 m/s, respectively?
(II)A\(\frac{5}{8}\;{\rm{in}}\). (inside) diameter garden hose is used to fill a round swimming pool 6.1 m in diameter. How long will it take to fill the pool to a depth of 1.4 m if water flows from the hose at a speed of 0.40 m/s?
Show that the power needed to drive a fluid through a pipe with uniform cross-section is equal to the volume rate of flow, \({\bf{Q}}\), times the pressure difference \({{\bf{P}}_{\bf{1}}}{\bf{ - }}{{\bf{P}}_{\bf{2}}}\), Ignore viscosity.
You need to siphon water from a clogged sink. The sink has an area of and is filled to a height of 4.0 cm. Your siphon tube rises 45 cm above the bottom of the sink and then descends 85 cm to a pail as shown in Fig. 10–59. The siphon tube has a diameter of 2.3 cm. (a) Assuming that the water level in the sink has almost zero velocity, use Bernoulli’s equation to estimate the water velocity when it enters the pail. (b) Estimate how long it will take to empty the sink. Ignore viscosity.
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