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Air enters a machine at 373 K with a speed of 200 m/sec, and leaves it at the temperature of the standard sea level atmosphere. In order to have the machine deliver 100,000 Nm/kg of air without any heat input, what is the exit air speed? What is the exit speed when the machine is idling?
suppose the past data indicates that the probability of a fluorescent light produced from a production line has a
A piston-cylinder device is insulated and contains 0.005 m3 of saturated liquid water at a constant pressure of l50 kPa. An electric resistance heater inside the cylinder is now turned on, and 1800 kJ of energy is transferred to the steam.
Refrigerant 134a leaves the evaporator as saturated vapor at 1.4bar and is heated at constant pressure to 20 degrees C before entering the compressor.
the water in a large lake is to be used to generate electricity by the installation of a hydraulic turbine-generator at
steam at 1.6 mpa and 400 degrees celcius is contained in a rigid box. the system is then cooled to 200 degees celcius.
one kilogram of water fills a 150-l rigid container at an initial pressure of 2 mpa. the container is then cooled to 40
a 23 kg crate rests on a 10 kg hand cart as shown. the center of mass of the combined cratecart is at c. the cart is
a 50-cm by 50-cm plate of pure nickel generates 3.9 mwnr of energy uniformly within the plate. all four sides of the
as a particle moves from the origin to 12i 6j m it is acted upon by a force given by 4i 8j n. calculate the work done
a flat-bottomed barge 25 m long and 10 m wide submerged to a depth of 1.5 m is to be pushed up a river at a rate of 8.6
Determine whether laminar-to-turbulent transition occurs in the boundary layer of the fuselage. If transition occurs, where does it occur - Estimate the skin friction drag on the aircraft's fuselage.
a 45 mw turbine receives steam from 3 boilers. the first inlet has a mass flow rate of 10 kgs at 4000 kpa and 800 deg c
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