The no-slip condition for a fluid:. a. depends on the roughness of the surface.
b. applies only to liquids and gasses.
c. states that the velocity of the fluid in contact with the surface is equal to the velocity of that surface.
d. was determined from fundamental principles of Newtonian mechanics.

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