Answer to Question #278938 in Classical Mechanics for joseph

Question

1. A 10-cm ASME flow nozzle is installed in a 20-cm (horizontal) waterline. The attached manometer contains mercury (SG = 13.6) and water and registers a pressure difference of 42-cm. Calculate the discharge in the pipe.

2. Determine the discharge over an uncontracted horizontal weir when the upstream water depth is 7.0 ft. The sharp-crested weir is 9.0 ft long and 6.0 ft high.

Answer 1

1.

$Q=\frac h{\Delta \rho g}+\frac{\pi(d_2^2-d_1^2)}{4g}=0.18~\frac{kg}s.$

2.

$Q=\frac{\rho V}g+\frac{A}{2\rho g}=21.2~\frac{m^3}s.$