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Oxygen gas initially at 300 K and 100 kPa is contained in a rigid tank. Two alternative processes are to be considered to increase its temperature to 500 K. The gas receives the energy
(a) adiabatically by means of a paddle wheel driven by an external source and
(b) by means of an external heat reservoir at 600 K. In the second case the temperature at the boundary is taken to be the gas temperature throughout the process. Determine the following: 1). the exergy change ,2) the irreversibility, 3). the effectiveness of the overall process for each of the two parts of the problem. Use an environment at 300 K, 100 kPa, V= 0 m/s and Z = sea level .
An astronaut wants to remove a bolt from a satellite in orbit. He positions himself so that he is at rest with respect to the satellite, What is wrong with his method
You have a grindstone ( a disk) that is 84.0 kg, has a .307-mradius, and is turning at 104.0 rmp, How many turns wil the stone make before coming to rest
During a drive by golfer Tiger Woods, the angular velocity of his club is zero at the top of the backswing and the 1719 degree/second at the bottom of the downswing just before impact with the ball
A model rocket is fired vertically from rest. It has a net acceleration of 16.5 m/s2. After 1.1 s, its fuel is exhausted and its only acceleration is that due to gravity. how high does the rocket travel
question a train locomotive is pulling two cars of the same mass behind it. determine the ratio of the tension in the
When one person was talking in a small room, sound intensity level was 60dB everywhere within the room. Then, there were 14 people talking in similar manner at the same time in the room, what was the resulting sound intensity level.
The angular momentum of Earth is constant
An aircraft?starts at rest and is accelerated?at 13.2?m/s2 for 8.5 seconds, at which time the aircraft launches. What is the distance traveled from the starting point
An 1590 kg car stopped at a traffic light is struck from the rear by a 873 kg car and the two become entangled. what is the speed of the entangled mass after the collision
question calculate the change in the amount of bremsstrahlung that would be produced if an aluminum target were
The liquid level system shown in the below figure is initially at the steady state with the inlet flow rate at 1 cfm. Calculate the maximum & minimum values of the output.
A charge of -3.55 nC and a charge of -5.65 nC are unconnected by a distance of 60.0 cm. Find the position at which a third charge of +7.20 nC can be located so that the net electrostatic force on it is zero.
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