Avariable mesh screen produces a linear and axisymmet- ric velocity profile as indicated in fig. p5.50 in the air flow through a 2-ft-diameter circular cross-sectional duct. the static pressures upstream and downstream of the screen are 0.2 and 0.15 psi and are uniformly distributed over the flow cross-sectional area. neglecting the force exerted by the duct wall on the flow- ing air, calculate the screen drag force.

Hunter is in lab. he clears a spot on his lab bench to start working. he also puts his lab coat and goggles on. he then identifies where all of the safety equipment is. he notices his station is next to the fume hood, which ventilates the chemicals stored there. the noise of the fume hood was bothersome, so hunter turned it off. which could be an error in his set-up? he should not turn off the fume hood.  he should wait to put on his coat until after the directions are given.  he should wait to put on his goggles until after the directions are given.  he should not sit next to the fume hood.