An inclined venturi meter is used to measure the flowrate of water through a pipe having a diameter of 5.4 cm. the pipe is inclined 40 degrees to the horizontal. the distance between the entry section and the throat of the venturi along its longitudinal axis is equal to 12 cm. the throat diameter is 1.8cm. the reading in the u-tube manometer is equal to 17cm. an electronic flowrate sensor installed further upstream along the pipe shows a reading equal to 96 dm3/min. the relative density of the manometric fluid is 13.6. calculate the: (i) theoretical flowrate as derived from the u-tube reading. (ii) discharge coefficient of the venture meter.

A3-mm-thick panel of aluminum alloy (k 177 w/m-k, c 875 j/kg-k and ? = 2770 kg/m) is finished on both sides with an epoxy coating that must be cured at or above t,-150°c for at least 5 min. the production line for the curing operation involves two steps: (1) heating in a large oven with air at ts,0-175°c and a convection coefficient of h, 40 w/m2. k, and (2) cooling in a large chamber with air at 25°c and a con- vection coefficient of he 10 w/m2.k. the heating portion of the process is conducted over a time interval te which exceeds the ime required to reach 150°c by 5 min (h = r + 300 s). the coating has an emissivity of ? = 0.8, and the temperatures of the oven and chamber walls are 175 and 25°c, respectively. if the panel is placed in the oven at an initial temperature of 25°c and removed from the chamber at a safe-to-touch tempera ture of 37°c, what is the total elapsed time for the two-step curing operation?