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How would you describe the state of the water in a bathtube? How would you describe the process that this water experiences as it cools?
It is desired to design a cooler in which the tubes are 4 mm diameter, to cool 10,000 kg of milk per hour from 20C-3C. Calculate how many tubes would be needed in parallel to give a Reynolds number
Assume the filling process is so slow that the tank air temperature remains constant at 288 K. (Q cannot equal 0) Find the mass added to the tank and the elapsed time.
A flow of 0.5 kg/s superheated steam at 5 Mpa, 400C and a flow of liquid water at 5 Mpa, 40C are mixed. If saturated water vapor at 4.5 Mpa is desired, what is the required flow rate of liquid(kg/
Path b moves directly toward the fire. What is the rate of change of temperature in degrees per sec of the students at r = 2m and t = 10s?
The compressor isentropic efficiency is 0.8. Calculate the specific work required by the compressor, in BTU/lb, to two significant figures.
Natural gas is a mixture of methane, ethane, propane, and butane...as well as other components. Find the final temperature and pressure of the gas.
Find the diameter given flow rate and pressure. What diameter orifice hole, d, is needed if under ideal conditions the flow rate of sea water through the orifice will be 31 gal/min.
What is the change in entropy using the 2nd Tds relation? what is the change in entropy using the 2nd Tds relation? assuming Cp(T)=[Cp(@T)+Cp(@T2)]/2.
Some of the flow exits at an intermediate pressure at (2), as shown. The remainder of the gas exits at low pressure at (3).
Determine the maximum allowable uniform load w that can be supported by the fiberglass beam if b = 125 mm and the allowable bending stress for the material is sallow = 13 MPa
A 1 kg ideal gas mixture at 1 atm has the following mass composition: 15% O2, 50% N2, 35% CO2. Calculate using tabulated enthalpies only, the amount of energy (in kJ) required to raise the temperatu
Sketch the ball termperature verses time for 0<t<1 hour. Also show the ambient temperature, T_infinity, in your graph. Explain the special features of the ball temperature behavior
Air flows over a flat plate at a constant velocity of 20 m/s and ambient conditions of 20 kPa and 20°C. The plate is heated to a constant temperature of 75°C, starting at a distance of 7.5 c
5-15 Air at at 300°K and 1 atm. flowing over a flat plate at 30 m/s, how thick is boundary layer at 2.5 cm from the leading edge of the plate? How much is the thickness at 5 cm?
A drop of saline forms on the tip of a 5 mm diamter needle that is held in the verticle position. What is the maximum size the drop will form before separating from the needle and falling?
A convective heat transer coefficient equal to 210 W/ (m^2-K). Determine the maximum diamter that the thermocouple can have and still meet the desired response characteristics.
The dynamic error in a temperature measurement using a thermocouple is 70% at 3 s after an input step change in temperature. Determine the magnitude ratio of the thermocouple's response at 1 s.
A steam turbine receives steam as a dry satured vapor at 7.0 MPa and expands adiabatically to atmospheric pressure, 100 kPa. The turbine uses 24.3 kg/h of steam for each kW. What is the entropy of
In an air compressor the compression takes place at a constant internal energy and 50 kj of heat are rejected to the cooling water for every kilogram of air. Calculate the work input for the compre
The spring mounted slider moves in the horizontal guide with negligible friction and has a velocity vo in the x-direction as it crosses the mid position where x=0 and t=0.
The manufacture claims an accuracy of + and -4% of full scale. Estimate the maximum error when reading a voltage of 80v. give your answer in volt.
Steam enters the turbine of a cogeneration plant at 7 MPa and 500 °C. One quarter of the steam is extracted from the turbine at 600 kPa for process heating. The remaining steam continues to expa
A 1m^3 rigid tank initially contains 5*kg of steam at 150degC. A relief valve on top of the tank is opened to allow steam to slowly escape the tank. Heat is added to the water in the tank to maintai
Required gusset plate and thickness for the tensile capacity of angle obtained in part a above. Take the yield strength as 36 ksi. and ultimate strength as 58 ksi.