A50 meter wide rectangular channel is carrying a flow of 250 m3/s
at a flow depth of 5 meters. to produce critical flow in this
channel, determine
a.) the height of the step in the channel botom if the width
remains constant.
b.) the reduction in the channel width if the channel-bottom level
remains unchanged.
c.) a combination of the width reduction and the bottom step.

A-mn has a cubic structure with a0 0.8931 nm and a density of 7.47 g/cm3. b-mn has a different cubic structure, with a0 0.6326 nm and a density of 7.26 g/cm3. the atomic weight of manganese is 54.938 g/mol and the atomic radius is 0.112 nm. determine the percent volume change that would occur if a-mn transforms to b-mn.

For a gate width of 2 m into the paper, determine the force required to hold the gate abc at its location.

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.