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A diffuser receives an ideal gas flow at 100 kPa, 300 K with a velocity of 250 m/s and the exit velocity is 25 m/s
A differential pressure gauge mounted on a vessel shows 185 lbf/in.2 and a local barometer gives atmospheric pressure as 0.96 atm. Find the absolute pressure
A diesel engine has a bore of 0.1 m, a stroke of 0.11 m and a compression ratio of 19:1 running at 2000 RPM (revolutions per minute)
A film of ethanol at 20°C has a surface tension of 22.3mN/m and is maintained on a wire frame. Consider the film with two surfaces as a control mass
A farmer runs a heat pump with a 2 kW motor. It should keep a chicken hatchery at 30oC, which loses energy at a rate of 10 kW to the colder ambient Tamb.
A fan is to accelerate quiescent air to a velocity of 10 m/s at a rate of 4 m3/s. Determine the minimum power that must be supplied to the fan.
A fan is powered by a 0.5-hp motor and delivers air at a rate of 85 m3/min determine the highest value for the average velocity of air mobilized by the fan.
A flow of liquid glycerine flows around an engine, cooling it as it absorbs energy. The glycerine enters the engine at 60oC and receives 9 kW of heat transfer
A flow of 2 kg/s completely dry air at T1, 100 kPa is cooled down to 10?C by spraying liquid water at 10°C, 100 kPa into it so it becomes saturated moist air
A flow moist air at 100 kPa, 40°C, 40% relative humidity is cooled to 15°C in a constant pressure SSSF device. Find the humidity ratio of the inlet
A flat surface having an area of 2m2 and a temperature of 350K is cooled convectively by a gas at 300K. Using data determine the largest and smallest heat
A fixed mass of an ideal gas is heated from 50 to 80°C at a constant pressure of
A desktop computer is to be cooled by a fan whose flow rate is 0.34 m3/min. Determine the mass flow rate of air through the fan at an elevation of 3400 m
A cylinder, Acyl=7.012 cm2, has two pistons mounted, the upper one, mp1=100 kg, initially resting on the stops.
A cylinder/piston contains 1 kg methane gas at 100 kPa, 20°C. The gas is compressed reversibly to a pressure of 800 kPa
It is cooled to 75 F, at which point the pressure is 45 lbf/in.2. Calculate the heat transfer for the process.
A cylinder with a linear spring-loaded piston contains carbon dioxide gas at 300 lbf/in 2 with a volume of 2 ft3. The device is of aluminum and has a mass of 8
A cylinder/piston contains saturated vapor R-22 at 10°C; the volume is 10 L. The R-22 is compressed to 2 MPa, 60°C in a reversible (internally) polytropic
A cylinder/piston contains carbon dioxide at 1 MPa, 300°C with a volume of 200 L. The total external force acting on the piston is proportional to V 3
A cylinder/piston contains air at ambient conditions, 100 kPa and 20°C with a volume of 0.3 m3. The air is compressed to 800 kPa in a reversible polytropic
A diesel engine has a compression ratio of 20:1 with an inlet of 95 kPa, 290 K, state 1, with volume 0.5 L. The maximum cycle temperature is 1800 K
A desuperheater mixes superheated water vapor with liquid water in a ratio that produces saturated water vapor as output without any external heat transfer
A department store expects to have 120 customers and 15 employees at peak times in summer. Determine the contribution of people to the total cooling load
A damaged 1200-kg car is being towed by a truck. Neglecting the friction, air drag, and rolling resistance determine the extra power required
A dam retains a lake 6 m deep. To construct a gate in the dam we need to know the net horizontal force on a 5 m wide and 6 m tall port section