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Introduction to Heat Transfer
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- A glass tube of 8 mm ID is immersed in a liquid at 20°C. The specific weight of the liquid is 20601N/m3 . The contact angle is 60°. The capillary rise was 1.82mm. Determine the value of surface tensionarrow_forward(a) Answer the followings: (i) What is a surface tension? (i) “When a glass tube is immersed in a pool of mercury, the meniscus is depressed." Based on the above statement and Figure la, explain why the meniscus is depressed? Mercury Figure la (b) Two immiscible layers of Newtonian fluid are dragged along by the motion of an upper plate as shown in the Figure 1b. The bottom plate is stationary and the velocity profiles for each fluid are linear. The top fluid (fluid 1), with a specific gravity of 0.8 and kinematic viscosity of 1.0 × 10“ m²/s, puts a shear stress on the upper plate. The lower fluid (fluid 2), with a specific gravity of 1.1 and kinematic viscosity of 1.3 × 10“ m²/s, puts a shear stress on the bottom plate. Determine the ratio of the shear stress on the top plate to the shear stress on the bottom plate. 3 m/s 0.010 m fluid 1 fluid 2 0.036 m 2 m/s Figure lbarrow_forwardCan someone please help me to solve the following question showing all work.arrow_forward
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- Principles of Heat Transfer (Activate Learning wi...Mechanical EngineeringISBN:9781305387102Author:Kreith, Frank; Manglik, Raj M.Publisher:Cengage Learning