# Chapter 10-Fluids and Kinetic Theory - Chapter 10 Fluids...

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I01. What is the approximate mass of air in a classroom that is 12.50 m x 4.00 m x 5.10 m?02. A wooden totem pole made of red cedar (SG = 0.380) has an approximate volume of 12.5 m3. What is itsapproximate mass?03. A penny made in the United States in 1938 has a mass of 3.10 g and a diameter of 1.90 cm. What is thethickness of the penny?II04. A bottle has a mass of 46.75 g when empty and a mass of 104.32 g when filled to the brim with water. Thewater is emptied and the bottle is filled with an unknown fluid giving the bottle a fluid-filled mass of 92.23 g.a.) What is the specific gravity (SG) of this fluid?b.) What might this fluid be?05. If 6.00 L of antifreeze (SG = 0.80) are added to 5.00 L of water, what is the SG of this 11.0-L mixture?III06. How much fresh water must be added to 12.5 L of sea water to produce a mixture with a SG of 1.018?Chapter 10Fluids and Kinetic Theory10.1 DensityHomework #75Density of SubstancesSubstanceDensity (r)SubstanceDensity (r)(kg/m3)(kg/m3)SolidsAluminum2.70x 103Copper8.92x 103Concrete2.3x 103Iron and Steel7.85x 103Gold19.32x 103Ice0.917 x 103Lead11.30x 103Platinum21.45x 103Silver10.49x 103Tin7.31x 103Uranium18.74x 103Zinc7.14x 103ANSWERS:01.329 kg02.4750 kg03.1.23 mm04.a.) 0.790b.) ethyl alcohol05.0.8906.4.86 L (results anywhere from 4.22 L to 5.6 L depend on rounding techniques)LiquidsWater1.00x 103Blood, plasma1.03x 103Blood, whole1.05x 103Ethyl Alcohol0.79x 103Gasoline0.68x 103Mercury13.6x 103Sea Water1.025 x 103Vegetable Oil0.93x 103GasesAir1.29Carbon Dioxide1.98Helium0.179Steam (100EC)0.598
I01. The arm of a record player exerts a force on a record. This force is equivalent to a 1.00 g mass sitting directly onthe stylus. If the stylus has a diameter of 0.0013 cm, calculate the pressure on the record grove in __________.
02. A healthy value for diastolic blood pressure is 80.0 mm Hg. What would be the reading if measured in__________.
03. A physics teacher stands 1.88 m tall. What is the difference in blood pressure between the top of his head and thebottom of his feet when he is standing upright?04. A lab desk has dimensions of 1.629 m in length by 0.610 m in width with a mass of 38.6 kg.a.) What is the total force acting on the top of the table from the atmosphere on an average day?b.) Assuming the desk is not bolted to the floor, what is the total force need to lift this desk?c.) Why is the answer to b.) less than a.)?II05. A cylindrical swimming pool with a diameter of 5.486 m is filled to a height of 1.220 m.a.) What is the total pressure at the bottom?b.) What is the total force on the bottom?c.) What is the total pressure on the side of the pool at the bottom?d.) What is the total pressure on the side of the pool at the top?e.) Estimate the total force on the side of the pool? (SAcylinderis 2prh) Hint: Use average pressure to get total force.06. Each of the four tires of a 1450-kg car have a gauge pressure of 221 kPa (32.0 lb/in2). How much area of each tireis in contact with the ground?07. A rectangular-shaped bulkhead that is 72.0 m wide by 12.0 m high has water up to the top edge of the bulkhead.a.) What is the total force on the bulkhead if it is located in a fresh-water river?

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