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In your night job at the Patent Office, you receive a plan for a device that is claimed to produce 26 kW of electrical power continuously, using 0.021 kg/s of water entering the device at 300 °C and 5 MPa and leaving at 60 °C and 0.1 MPa. Unlimited heat exchange of the device with the environment at Tenv = 20 °C is permitted. Use the NIST web book for water properties (see instructions on next page)
(a) As you are the only chemical engineer in the office, you are asked to evaluate to whether steady-state operation of this claimed device is thermodynamically permissible.
(b) If the device is possible, calculate the lost work and the thermodynamic efficiency. If it is not possible, what is the maximum power that can be generated?
If the entrance velocity into the pipe is 12.5 m/s, what is the rate of flow of the material (air) 'Rm'? What is the velocity 'Vf' when the air is ejected into the surroundings at 1 atm through a nozzle
The coefficient of static friction between the ladder and the ground is 0.55, and the ladder makes a 50.0° angle with the ground. Explain how far up the ladder can an 760 N person climb before the ladder begins to slip?
A window air-conditioner unit absorbs 9.75×10^4J of heat per minute from the room being cooled, What is the power consumption of the unit in watts
a block of wood of mass m1= 1 kg slides to the right on a frictionless horizontal table with a speed of 30 m/s. how much is the spring compressed by the wood
When a mass m is attached to a vertical spring with a force constant k, it stretches the spring by the amount L. Calculate the period of this mass.
Two particles each have a mass of 6.0 × 10-3 kg. One has a charge of +5.0 × 10-6 C, and the other has a charge of -5.0 × 10-6 C. They are initially held at rest at a distance of 0.80 m apart.
a small particle with a mass of 2 kg carrying a charge of 1 nc is at the surface of a charged spherical conductor of
There is a uniform electric field throughout the region given by E = 4.9i + 7.1j + 3.6k in N/C units, What is the magnitude of the total flux through the five non-shaded faces
A mass m slides without friction on a 1-dimensional track. The mass is moving from left to right with initial velocity v0. Determine the position where the mass will come to rest
A certain lightbulb has a tungsten filament with a resistance of 18.0 when cold and 138 when hot. Find the temperature of the hot filament
A frequently quoted rule of thumb in aircraft design is that wings should produce about 1000 N of lift per square meter of wing. How fast must it move over the upper surface to create the ideal lift
Vector A has a magnitude of 10m and makes an angle of 78o with the positive x axis. Vector B also has a magnitude of 13m and is directed along the negative x axis. Enter your answers in distance then angle (in degrees).
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