A 6.85 in pump running at 3500 r/min has the following measured performance for water at 20C. Q, gal/min 50 100 150 200 250 300 350 400 450H, ft 201 200 198 194 184 181 159 156 139% 29 50 64 72 77 80 81 79 74 Estimate the horsepower at BEP. If this pump is rescaled in water to provide 20 bhp at 3000 r/min determine the approtiate (b) impeller diameter, (c) flow rate, and (d) efficiency for this new condition

Afoot bridge is made as a simple deck, 4 m long, with a cross section 2 m (wide) and 20 cm thick, and made of wood. the deck is supported at the two ends. the maximum load allowable on the bridge is 10 tons, provided it is uniformly distributed on the deck. to sense this load, a strain gauge is placed at the center of the bridge and its resistance is monitored. if the sensor has a nominal resistance of 350 s2 and a gauge factor of 3.6, what is the reading of the strain gauge at maximum load? the modulus of elasticity for the wood used in the construction is 10 gpa.