Apitot tube is used to measure air speed in an experimental setup similar to your "flow over a flat plate" experiment with an atmospheric pressure of 100 kpa. if the measured gage pressure is recorded as 3.7 cm of water, obtain: (a) the air speed. assume a density of 1.206 kg/m 3 for air and a density of 992 kg/m 3 for water. enter your answer in meters per second (m/s).

The higher the astm grain-size number, the coarser the grain is. a)-true b)-false

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

Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)