Aviscous liquid is sheared between two parallel disks of radius r, one of which rotates while the other is fixed. the velocity field is purely tangential, and the velocity varies linearly with z from vθ = 0 at z= 0 (the fixed disk) to the velocity of the rotating disk at its surface ðz=hþ. derive an expression for the velocity field between the disks

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.

In general, how do thermosetting plastics compare to thermoplastics in mechanical and physical properties?