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If both collars weigh 0.75 lb, determine the normal force which the curved rod exerts on one collar at the instant u = 120 . Neglect friction. N=2.77 lbs. Show steps.
During this process, the pressure inside the tank remains constant. Determine a) the mass of the refrigerant that has escaped in lb, b) the heat transferred during this process in Btu.
A clock is slow, such that it falls behind 15.2 min in every hour. Calculate the angular velocity of its second hand (the one that ticks every second) in rad/sec?
Therefore is constrained to move in a circular arc of radius r. Determine the velocity of A in terms of the downward velocity vb of the counterweight for any angle theta.
Find the Cartesian components of tension T_DA , which is directed from D to A. Part B - Determining an unknown force If the tensions in cables DA and DB are T_DA = 760 and T_DB =1460 , respectively,
The valve is next opened and steam from the line at 1.35 MPa and 288 degrees Celcius flows into the tank until the pressure is 1.35 MPa. Find the mass of steam that flows into the tank.
Initially the air in this tank is at 20 psia and 70 degrees F. Presuming that the ank is well insulated determine the temperature and mass in the tank when it is filled to 120 psia.
Its specific heat ratio is 1.4 and gas constant is 0.287 kJ/kg-K. a) A regenerative Brayton cycle with a regenerator effectiveness of 80%. b) Cycle of part (a) with intercooling to 20 C.
Determine the efficiency and the horsepower output if the cutoff ratio is halved. Assume the air is an ideal gas with constant specific heats. Its specific heat ratio is 1.4 and gas constant is 0.28
If the friction mep is 1.22 bar in both cases, determine the fuel cost of the two installations in mills per kilowatt- hour?
Calculate the overall efficiency, the heat rate [MW], and the total fuel rate [kg/s] of a combined-cycle power plant (1) if no supplemental firing is used.
The cylinder from a supply line until all the liquid in the cylinder has vaporized. Determine a) the final temperature in the cylinder and b) the mass of the stream that has entered.
Determine: (a) the minimum diameter required for tie rod (1). (b) the minimum diameter required for the double shear pins at B and D. (c) the minimum diameter required for the double shear pin at C.
Knowing that P starts from rest, and it's speed increases at a constant rate of 10mm/s^2, determine (a) the magnitude of the acceleration when t=4 s (b) the time for the magnitude of the acceleratio
Coming out of a factory chimney are the following gases, CO2, SO2, O2, N2, H2O with volume percentage to be 13.5%, 0.3%, 5.2%, 76%, and 5% respectively. Calculate density of the gas mixture.
Determine (a) the tractive force exerted by each locomotive at 21 mi/hr, (b) the power required from each locomotive at 21 mi/hr, (c) the power required from each locomotive as the train speed appro
Determine (a) the principal stresses on an element from the cylindrical portion of the tank surface, and (b) the principal stresses on an element from a portion of the spherical end caps.
For material A, K=60,000 psi, n=0.5, A0=0.6 in2. For material B, K=30,000, n=0.5, A0=0.3 in2. Calculate the maximum tensile force that this cable can withstand prior to necking.
The water is cooled to a temperature of 110 o C. At this temperature the masses of the saturated vapor and liquid are each 0.75 kg. Determine the heat transfer for the process, in kJ.
The heat to the surrounding at 25 C until the steam is completely condense. Determine the net entropy change of the universe for this process.
Determine the a) change in entropy of the system, b)Change in entropy the surrounding and c) change in entropy the universe during this process.
A refrigeration cycle operates continuously and removes energy from the refrigerated space at a rate of 12,000 Btu/h. The coefficient of performance is 2.6. Determine the net power required (hp).
Determine the slab thickness 2L required to transfer a total amount of energy such that Q/Qo = 0.90 over a t= 8-h period. The initial concrete temperature is Ti=40 degrees celcius.
Finally compressed at the constant pressure to the initial state. Determine the boundary work for each process and the total work of the cycle.
It is now expanded to a final pressure of 50Pa. During this process the temperature inside the cylinder remains constant. Calculate the work.