SURVEYING 1 Define each of the listed terms as used in levelling.
(I)Stipe station,
(II) Vertical line;
(III) horizontal surface,
(IV)Contour line;
(V)Benchmark.​

Steam enters a converging nozzle at 3.0 mpa and 500°c with a at 1.8 mpa. for a nozzle exit area of 32 cm2, determine the exit velocity, mass flow rate, and exit mach number if the nozzle: negligible velocity, and it exits (a) is isentropic (b) has an efficiency of 94 percent