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A cylinder/piston contains carbon dioxide at 1 MPa, 300oC with a volume of 200 L. The total external force acting on the piston is proportional to V3. The system is allowed to cool to room temperat
Calculate the steady rate of entropy production, s& (kJ/K/s), by the power unit & by the refrigeration unit. Entropy production is not a good thing. Find the amount of unnecessary or lost po
A power cycle operates between hot and cold reservoirs at 500K and 310K, respectively. At steady state the cycle develops a power outpoint of 0.1 MW.
Carbon monoxide in a piston-cylinder device is compressed from 1 bar and 37?C to 3 bar and 147?C. The compression process requires work input of 88 kJ/kg.
Plot the reciprocal lattice for a polycrystalline sample of a material with a simple tetragonal structure and lattice parameters a=3.0A and c=5.0A
Graphically determine the angular rotation required to orient the sample for 300 diffraction if a theta-2theta diffractometer is used.
A gondola on a ski lift is supported by two bent arms, as shown in Fig. 3. Each arm is offset by the distance b=180 mm from the line of action of the weight force W. The allowable stresses in the ar
A closed piston-cylinder with air expands and does 2000 ft-lbs of work. Heat is added in the amount of 4 btu. What is the change in internal Energy.
Determine the simplified structure factor equations for each cell and the positions (2theta values) that would be observed (F^2=0) on a powder pattern made with CuKalpha radiation.
A model (1/10 of scale) of a tractor-trailer rig is tested in a wind tunnel. Calculate the coefficient of drag assuming that the density of air is 1.25 kg/m^3.
100kPa and 22 °C air is contained in a rigid tank of 2 m3. There is supply line connected to the tank through a valve. If the valve opens, the air in the supply line with 600kPa and 22 °C fl
More heat is transferred to the air until the temperature becomes 1000 K. Show the processes on a P-V diagram and calculate the following The final pressure in the cylinder.
A mixing chamber steadily mixes a hot water stream at 80°C and 0.5kg/s rate with a cold water stream at 20°C. If the leaving mixture is at 42°C and mixing happens at 250kPa, determine t
A nozzle with inlet area of 800 cm2 and inlet steam velocity is 10m/s. The steam pressure is 800kPa and temperature is 400C at the inlet and the pressure and temperature change into 200kPa and 300&d
Knowing that the constant of eachspring is 2 kN/m, determine (a) the velocity of the block after ithas moved down 50 mm, (b) the maximum velocity achieved by theblock.
A heat pump with a COP of 3.0 is used to heat air contained in a 1205.4m^3 of well-insulated, rigid tank. Initially the pressure and the temperature inside the gas tank are 100 kPa and 7 degrees Cel
A system executes a power cycle while receiving 1050 kJ by heat transfer at a temperature of 525 K and discharging 700 kJ by heat transfer at 350 K. There are no other heat transfers.
Determine the temperature (or quality if a saturated mixture) of the water as it leaves the chamber at a pressure of 1.4MPa and the entropy generation per unit mass of steam exiting the chamber.
2 kg of saturated water vapor at 600 kPa are contained in a piston-cylinder device. The water expands adiabatically until the pressure reaches 100 kPa. Find the entropy change of the water.
A cannon is pointed at 60 degrees angle relative to flat horizontal field. it fires a projectile with a muzzle speed of 1500 ft/s Then the gunner changer the angle to 30 reload the cannon and 5.0 se
Due to the elasticity of the balloon, the pressure remains proportional to the diameter squared at all times. Determine the work (kJ) and heat transfer (kJ) associated with this process.
Assuming the mass of the whip is uniformly distributed along its length, calculate the velocity of the end of the whip as a function of the position of the loop (x), and calculate the position of th
During this process heat is transferred to the system to maintain the air within the system at 30*C. Determine this heat transfer (kJ).
A 4mx5mx6m room is to be heated by a baseboard resistance heater. It is desired that the resistance heater be able to raise the air temperature in the room from 7 to 23oC within 15 min.
Determine the exit velocity of the stream (ft/s) and the mass flow rate (lbm/s) of the steam at the nozzle entrance if the nozzle exit area is 0.01ft^2.