By T L Cottrell

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2) is under a pressure of 8 atm. What is its density, expressed in gm/cc, at 27°C? 2. wt. = 44) is compressed into a cylinder at 80°F. If its density is 0-304 lb/ft3, what is the pressure in the cylinder, expressed in psia? (Ans. 3. A liquid has a kinematic viscosity of 0Ό52 cm2/sec. If the density of the liquid is 60 lb/ft3, what is its dynamic viscosity, expressed in centipoises? The liquid fills a space between two parallel plates, 0· 1 cm apart. What force, expressed in dynes and lb-f, is required in moving one plate past the other stationary plate, with a velocity of 0-2 cm/sec, if the moving plate has an area of 10,000 cm2?

Ans. 3. A liquid has a kinematic viscosity of 0Ό52 cm2/sec. If the density of the liquid is 60 lb/ft3, what is its dynamic viscosity, expressed in centipoises? The liquid fills a space between two parallel plates, 0· 1 cm apart. What force, expressed in dynes and lb-f, is required in moving one plate past the other stationary plate, with a velocity of 0-2 cm/sec, if the moving plate has an area of 10,000 cm2? 4. A cylinder, of 0-4 ft radius, rotates coaxially inside a stationary cylinder of 0-42 ft radius with a liquid of 2-4 poise viscosity filling the annular space.

17. 9. of the water being kept at a pressure of 2-17 psig by compressed air. , what are the coefficients of contraction, velocity and discharge under the conditions of the test? What is the loss of head, expressed in feet of water? 43 GENERAL PRINCIPLES Solution Coefficient of contraction = Jet area Orifice area 0-8 \ 2 The rate of discharge in cfs is ß- 351 (60) (62-4) The total head available „ , (2-17) (144) Η+ρΙγ = η7 + ν 6 ^ ν 4 ; = 12 ft From eq. 42) Q = Coa V{2g(H+P/Y)} = CD (-^ ^ V{(64-4) (12)} Equating (60) (62-4) from which = C D (IOV)V772'8 CD = 0-61 From eq.

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