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KING FAHD UNIVERSITY CHEMICAL ENGINEERING COURSE NOTES (Fluid Mechanics)-HW1-053

# KING FAHD UNIVERSITY CHEMICAL ENGINEERING COURSE NOTES (Fluid Mechanics)-HW1-053

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CHE 204 – Assignment #1 Submit your answers for Q10-Q13 only. Q1. After reading pages 3 and 4 of your text, please explain whether jam is a fluid or a solid? Q2. Prove that the coefficient of thermal expansion for an ideal gas, α , is 1/T (see page 12 of your book). Q3 . Using the definition of viscosity (p. 13), explain why gases have lower viscosities than liquids. Q4 . (a) In Newton’s Law of viscosity (page 14). What are the dimensions of: i. du/dy ii. shear stress iii. viscosity (b) Shear stress is often called momentum flux. Show that shear stress has the same dimensions as momentum/(area x time). Q5 . What are the units of viscosity that would be obtained by substituting values of a and b (Table 1.4) in equation (1.17)? Q6 . (a) On page 17, equation (1.21) was derived for a droplet of liquid. Do you think this equation will also be valid for a bubble? Why? (b) Calculate the surface/volume of a sphere, a cube, and a right cylinder with the height

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Unformatted text preview: equal to the diameter. Which has the least surface/volume? Q7 . The surface tension of a fluid exposed to a gas is normally expressed in dyne/cm. How many lb f /in and N/m correspond to 1 dyne/cm? Q8 . Calculate the density and specific gravity of CO 2 at 300 kN/m 2 absolute and 60 o C. Q9 . Determine the gage pressure at the center of pipe A in pounds per square inch and in kilopascals. Q10 . A tank is fitted with a manometer on the side (as shown below). The liquid in the bottom of the tank and in the manometer has a specific gravity of (s) of 3.00 the depth of the bottom liquid is 20 cm. A 10-cm layer of water lies on the top of the bottom liquid. Find the position of the liquid surface in the manometer. Q11 . Solve problem 1.8 in your text. Q12 . Solve problem 1.15 in your text. Q13 . Solve problem 1.30 in your text. 2...
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