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A rigid vessel contains 10 kg of steam. The steam is initially at 10 bar and 300C. After a period of time the pressure in the vessel is reduced to 1 bar due to heat transfer with the surroundings. The surroundings are at a constant temperature of 20C. Determine the change in entropy of the system, the surroundings and the universe during this process.
liquid water is contained in an insulated rigid container. an electrical resistance heater is inside the device is
a special c-clamp uses a 0.5-in. diameter acme thread and a collar of 0.625-in. effective mean diameter. the collar is
the following data apply to the auxiliary power unit apu on the boeing 777 single-shaft unit driving separate load
an automobile tire with a volume of 0.6m3 is inflated to a gage pressure of 200 kpa. calculate the mass of air in the
a long jumper approaches his takeoff board a with a horizontal velocity of 30 ftsec. determine the vertical component
the piston diameter is 20.0 cm and the pumps stroke is 22.0cm. the pump is attached to an electric motor that is
A piston/cylinder device initially contains 0.1 cu. m. of air at 27 C. A very light piston that moves without friction is connected to a spring that is initially at its equilibrium position (no force). The spring constant is 100 kN/m and the area of ..
A fan that can provide air speeds up to 50 m/s is to be used in a low-speed wind tunnel with atmospheric air at 25°C. If one wishes to use the wind tunnel to study flat-plate boundary layer behaviour up to Reynolds numbers of Rex = 10^8 , what is the..
a rigid tank is filled with refrigerant r-134a at 310 k. an electric current of 0.2 amps over 220 volts is passed
a child a is swinging from a swing that is attached to a trolley that is free to move along a fixed rail. letting l
the velocity of a particle moving in the x-y plane is given by 6.12i 3.24j ms at time t3.65s. its average acceleration
Calculate spring stiffness for which the oscillator becomes unstable (gravity in the negative y direction) verify with SW Simulation (study 1)
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