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A 15 kg block (B) is being pulled along a smooth surface by a winch (A). Assume the winch is a 10 kg disc with a constant angular velocity of 12 rad/s, counter clockwise. What is the total kinetic
How many total interstitial sites are there in one cubic meter of Pt at 20 C Which would you expect to be more probable in Pt at 20 C, vacancy diffusion or interstitial diffusion?
A 3.27 m^3 tank contains 100kg of nitrogen at 225 K. Determine the pressure in the tank, using the following the ideal-gas equation of state.
Fluid A, available at 10oC is to be heated in a one-shell-pass four-tube-pass exchanger, heat using fluid B available at 180oC. When the mass flow rates of fluids A and B are mA and mB, the respecti
A 500 MW electric station, utilizes a Rankine Cycle power plant with superheat. The steam temperature and pressure at the turbine inlet are 1000ºF and 2000 psia.
Determine the final temperature (K) and the final pressure (kPa) of the complete system, assuming constant specific heats.
Sketch the yield envelope of a glassy polymer under biaxial and uniaxial stress. Explain shear yielding and crazing. Under what conditions can one expect there to be no crazing in the material.
Water at 20 MPa and 60 degrees celcius enters a mixing chamber at a rate of 280lbm/min, where it is mixed steadily with steam entering at 20psia and 230 degrees Farenheight at a rate of 25lbm/min.
Calculate the mass of the fluid present. Determine the value of n in the first process. Compute the net work of the cycle.
Develop the Maxwell and Kelvin-Voigt relations. Creep is deformation under constant stress while Stress relaxation is deformation under constant strain. Examine these two models for their viability
How would you classify sodium benzoate, ionic or molecular or both? Why do ionic compound tend to have higher melting points than molecular compounds?
An ancient underground aqueduct has been completely flooded and conveys water over adistance of 15.8 kilometers into the ruins of ancient city between two larg bodies of water that have difference i
The air is now reversibly compressed to 100 psia while its temperature is kept constant. How much heat must be added to this air during the compression? Show all steps.
A cube of aluminum 10 cm on each side is initially at a temperature of 300°C and is immersed in a fluid at 100°C. The heat-transfer coefficient is 900 W/ m2 · °C. The transient of
Give examples of different materials used in different cultures and time periods. Which materials are the most researched/sought-after materials right now? Why?
What is the angle at which diffraction occurs in Au from (101) using incident radiation with a wavelength of 1.54 A°. Au is FCC crystal and the atomic radius of the crystal is 1.44 A°?
Calculate the energy of vacancy formation in silver, given that the equilibrium number of vacancies at 800 °C (1073K) is 3.6x1023 m-3.
The diffusion coefficients for carbon in nickel are 5.5 x 10-14 m2/s at 600 °C and 3.9 x 10-13 m2/s at 700 °C, respectively. Calculate the magnitude of diffusion coefficient at 850 °C.
Careful measurements indicate that the fixed ends separate by .008 in. What loads are exerted on the ends of the tube, and what are the resultant stresses?
A piston-cylinder contains 0.1kg of superheated steam at 180 degrees celsius and 5 bars. What is the final temperature and the change in internal energy for the steam?
Knowing that a downward force of magnitude 120 N is applied to block D, determine (a) the acceleration of each block, (b) the tension in cord ABC. Neglect the weights of the pulleys and the effect o
What type(s) of bonding would be expected for the following materials: (a) brass, (b) rubber, (c) solid xenon, (d) aluminum sulfide, and (e) nylon.
A 3.0 cm a diameter copper sphere having a diameter initially at a uniform temperature of 50°C is suddenly exposed to an airstream of 10°C with h=15 W/m2 · °C.
At what time does the hour hand point in the same direction as the electric field vector at the center of the dial?
Assume that a drop of mercury is an isolated sphere. What is the capacitance of a drop that results when 10 drops each of radius R = 1.20 mm merge?