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If the rider, with inertia 68 kg starts at a height hi = 4 m and ends up after the first time across the pipe at a height that is 80% of the initial height, what is the force of friction across the
A sphere 10 times larger in diameter than an actual golf ball is used in the wind tunnel study. What speed should be selected for the model to simulate a prototype speed of 50 m/s?
Calculate the total thermal macroscopic cross section in cm-1 for a UO2 fuel pellet of mass density 10.0 g/cm3 containing 4.2 w/o (weight percent) enriched uranium.
What is the volumetric flow rate of the air entering the compressor in ft3/min? What are the temperatures at the compressor and turbine exits in °R? What is the thermal efficiency of the cycle?
Draw the process on a T-s diagram. What is the thermal efficiency of the cycle? What is the mass flow rate of air (lbm/h)? How much net power is developed by the cycle (BTU/h)?
Propose and briefly describe 2 methods to measure the internal corrosion rate of a pressure vessel that contains a liquid of very high electrical resistance.
Calculate the average corrosion rate CPR in mm/yr for the third specimen and the corresponding corrosion current density.
Propose two (2) methods that can be used for this purpose. Explain your choice indicating advantages/disadvantages of the proposed methods.
What can be done to remedy the problem? What changes would you propose to avoid this problem when manufacturing a second autoclave? Give brief explanation for each change.
Determine (a) the net power developed, in kW. (b) the rate of heat transfer to the steam passing through the boiler, in kW. (c) the thermal efficiency.
Determine the tempreture of the mixture leaving this device when the outlet pressure is 60psia. Show the equations, steps.
Determine the location of y(bar) of the center of mass G of the pendulum, then calculate the moment of inertia of the pendulum about an axis perpendicular to the page and passing through G.
Determine the moment of inertia about an axis perpendicular to the page and passing through the pin at O. The thin plate has a hole in its center.
Steam with a pressure of 15 MPa and a temperature of 400 degrees Celsius undergoes an expansion as it flows through a turbine to a final temperature of 30 degrees Celsius.
Gas entering the turbine has been heated to 1000K. A. What are the temperature at each point in the cycle? B. What is the thermal efficiency for this brayton cycle?
A fluid with a specific gravity of 0.91 and a viscosity of 0.38 pascal-seconds is pumped through a 25-millimeter diameter smooth pipe at an average velocity of 2.6 meters per second.
Use the TTT diagram to estimate how long the alloy must be held at 600OC to complete the formation of pearlite (eutectoid microsconstituent)?
Determine the average temperature on the surface of the circuit board assuming the air flows vertically upwards along the 12-cm- long side by (a) ignoring natural convection
The temperature of the glass cover is measured to be 40oC on a calm day when the surrounding air temperature is 20oC. Determine the rate of heat loss from the absorber plate by natural convection for
If the emissivity of the outer surface of the box is 0.85, determine the fraction of the heat lost from the outer surfaces of the electronic box.
Find Boundary layer thickness at 0.25 m from lower edge. Maximum velocity in boundary layer at this location and position of maximum
The heating value of agricultural residue biomass ( e.g., crop residues, animal manure and bedding and organic material from food production), can range from 4300 to 7300 Btu/lbm.
A 5.0 kg steel gear is heated to 150 degrees Celsius and then placed into a .5 gallon container of water at 10 degrees Celsius. What is the final temperature of the metal and water.
What is the flux of Cu atoms from the surface inward at 500 degree C? Al is FCC with a lattice parameter of 0.405 nm. Data for the Al-Cu system is in the table in the lecture slides.
Derive an expression for the angular acceleration of the bar for any angular position (theta) measured from the horizontal.