1-50 The pressure in a pressurized water tank is measured by a multi-fluid manometer. The gage pressure
of air in the tank is to be determined.
Assumptions The air pressure in the tank is uniform (i.e., its variation with elevation is negligible due to it

7-28E Heat is transferred isothermally from the working fluid of a Carnot engine to a heat sink. The
entropy change of the working fluid is given. The amount of heat transfer, the entropy change of the sink,
and the total entropy change during the process

6-21 The power output and fuel consumption rate of a power plant are given. The thermal efficiency is to
be determined.
Assumptions The plant operates steadily.
Properties The heating value of coal is given to be 30,000 kJ/kg.
60 t/h
Furnace
Analysis The

5-7 Air is accelerated in a nozzle. The mass flow rate and the exit area of the nozzle are to be determined.
Assumptions Flow through the nozzle is
steady.
Properties The density of air is given to be
V1 = 40 m/s
2.21 kg/m3 at the inlet, and 0.762 kg/m3 a

4-7A piston-cylinder device contains nitrogen gas at a specified state. The boundary work is to be
determined for the polytropic expansion of nitrogen.
Properties The gas constant for nitrogen is 0.2968 kJ/kg.K (Table A-2).
Analysis The mass and volume of

3-83 An automobile tire is inflated with air. The pressure rise of air in the tire when the tire is heated and
the amount of air that must be bled off to reduce the temperature to the original value are to be determined.
Assumptions 1 At specified conditi

2-15 A water jet strikes the buckets located on the perimeter of a wheel at a specified velocity and flow
rate. The power generation potential of this system is to be determined.
Assumptions Water jet flows steadily at the specified speed
and flow rate.
A

9-39 An ideal Otto cycle with air as the working fluid has a compression ratio of 9.5. The highest pressure and
temperature in the cycle, the amount of heat transferred, the thermal efficiency, and the mean effective pressure are
to be determined.
Assumpt

9-39 An ideal Otto cycle with air as the working fluid has a compression ratio of 9.5. The highest pressure and
temperature in the cycle, the amount of heat transferred, the thermal efficiency, and the mean effective pressure are
to be determined.
Assumpt