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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.
Sketch (not to scale) the variation of shear stress vs shear strain along the radius in a composite bar of total radius R whose inner material of radius 'ri' has a shear modulus greater than the ou
The storage tank of a water tower is a vertical cylinder of diameter D = 7 m, the initial depth of water within it is ho =6 m and the free surface is exposed to the atmosphere.
The flywheel of a small punching machine rotates at 360 rpm. Each punching operation requires 1500 ft-lb of work and it is desired that the speed of the flywheel after each punching be not less than
Simulation with arena, An office of a state license bureau has two types of arrivals. Individuals interested in purchasing new plates are characterized to have interarrival times distributed as expo (
An office of a state license bureau has two types of arrivals. individ, An office of a state license bureau has two types of arrivals. Individuals interested in purchasing new plates are characterized
A 500-hp hydroelectric plant generates power using water at a rate of 1000 ft^2/min with an overall efficiency of 35%. What is the minimum height of the water in units of ft?
Calculate (1) the final volume of the system, (2) the work done by the system, (3) the heat entering or leaving the system, (4) the change in the internal energy.
Assume the pressure in the air above the water was 40 kPa absolute, and the temperature of the water was 15 degrees Celsius. The cylinder was 0.70 meters long.
Without transforming the data use fminsearch to estimate C1 and C2. Plot the data and the two fits on the same graph. Be sure to use a legend to identify the fits.
The exit mass flowrate during this condition is constant at 20 kg/s. Find the elapsed time from when the relief valve first opens to the point when the water level drops below the top of the core.
If the instruments weigh 12 lbs, what should the diameter be of the spherical balloon? Assume the temperature to drop 10 degrees Fahrenheit for every 4000 feet height.