Energy Equation , Mass flow Rate

Problem statement:A flow at 60 m s−1 enters a nozzle kept horizontal. The specific enthalpy at the nozzle inlet and exit is 3025 and 2790 kJ kg−1, respectively,Neglecting the heat loss from the nozzle, calculate
(a) the flow velocity at the nozzle exit, (b) the mass flow rate through the nozzle, if the inlet area
is 0.1 m2 and the specific volume at inlet is 0.19 m3 kg−1, and (c) the exit area of the nozzle when
the specific volume at the exit is 0.5 m3 kg−1.

Equation 1:

The equation developed by Albert Einstein, which is usually given as E = mc², showing that, when the energy of a body changes by an amount E (no matter what form the energy takes), the mass (m) of the body will change by an amount equal to E/c².

Energy = Power x Time.

Equation 2:

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