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After a time t* it maintains a constant velocity, so that when t=160 s it has traveled 2000 ft. What is the time t* and what is the constant velocity?
The surface is frictionless. If the system is released from rest with B=60 degrees determine the a) angular velocity at B=20 degrees b) the veloctiy of point D at the same instant.
The steam generator at 730 degrees C and are cooled to 170 degrees C. For steady operation, determine the mass flow rate of combustion gases in kg/s.
The temperature is 68 F, and the velocity is 40 ft/s. The exit is located 50 ft above the inlet. Determine the power required by the pump, in Btu/s, and horsepower.
Determine for the air the change in exergy, the transfer of exergy accompanying work, and the exergy destruction, all in Btu. Ignore the effects of motion and gravity and let T0 = 537°R, p0 = 14
Management proposes using the EOQ order quantity and setting reorder points to ensure a 97% fill rate. Find the imputed cost of a shortage and the expected number of shortages per year.
Calculate (1) the material removal rate, (2) the tangential cutting force, and (3) the torque and power required for the operation.
Find the maximum tensile strength of the composite. You may assume that the matrix yields in tension at a stress of 40 MPa.
The height difference for the siphon is about 6 in. The hose diameter is 1 in. Assuming the flow is frictionless, what is your gasoline flow rate?
Determine the work done by the friction on the crate as the crate moves from the release point to the lowest point on the slide.
Determine the differential equations governing the motion as measured from static equilibrium position using any valid method.
Determine the angular speed of the disk when point B is driectly above the center of the disk. Hint: To determine the displacement of point C eep in mind that the overall displacement of point A i
Let L=19 cm and h=24.4 cm. If the system is released from rest when theta= -30 degrees, determine the maximum angle theta reached by the arm AB.
If M=1300 N*m, determine the number of revolutions of B needed to reach conditions simulating a car speed of 120 km/h.
Using a cold air-standard analysis with specific heat specified at 300 K, what is the thermal efficiency if the compressor and turbine are isentropic?
Assume that the condenser exit is liquid, whose temperature is 7 degrees below saturated liquid. Assume a throttling valve is downstream of the condenser. Determine the coefficient of performance.
Let the compression ratio be rv = 18.265. Assume a cutoff ratio of 2.2. Assuming isentropic expansion and compression, find the thermal efficiency of this cycle.
Carbon dioxide at 20 degrees C and a pressure of 575 kPa absolute flows in a pipe at a rate of 0.0041 kg/s. What is the maximum diameter if the developed flow is to be turbulent?
Calculate (a) power required for mixing and (b) if the system is scaled-up for mixing volume of syrup 100 times to that of the small tank as above keeping the mass transfer rate equal for each.
A copper sheet of thickness 2L=2mm has an initial temperature of Ti=118C. Determine the time needed for the sheet to reach a temperature of T=102C. Plot the copper temperature versus time for 0.
The boat's position during the interval of time from t= 2s tp t= 10s is given by s= 4t+1.6t^2-0.08t^3 m. Detremine the boat's velocity and acceleration at t= 4s?
Estimate the surface area of the pond for this level of continuous power production. Assume that the solar energy is incident on the pond at a rate of 500 W per m2 of pond area at noontime.
Determine the pressure and temperature at the end of each process in the cycle (at each state), the thermal efficiency, and the mean effective pressure. k=1.4.
At the beginning of the compression process (state 1), the air is at 90 kPa and 27±C. The maximum temperature in the cycle is 1127±C. Determine net work output per cylinder (per cycle),
The input flow rate is 3000 cubic meters per hour, and the pressure is 100 kPa. Using the air table and the steam tables, find the mass flow rate of water vapor in kg/s.