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The electrical resistor transfers 95 Btu of energy into the system. Eventually the system comes to equilibrium. Determine the final equilibrium temperature, in °F.
Sketch the cycle on P-v and T-v diagram. Label the states, show property values, and indicate appropriate lines of constant temperature or pressure.
Molybdenum forms a substitutional solid solution with tungsten. Calculate the concentration (in weight percent) of molybdenum that must be added to tungsten to yield an alloy that contains 1.16 x 10
For an alloy that consists of 28.9 wt% Pb and 71.1 wt% Sn, what is the composition (a) of Pb (in atom percent), and (b) of Sn (in atom percent)? The atomic weights for Pb and Sn are 207.2 and 118.6
Germanium forms a substitutional solid solution with silicon. Compute the weight percent of germanium that must be added to silicon to yield an alloy that contains 2.43 × 1021 Ge atoms per cub
Calculate the number of atoms per cubic meter in aluminum. The density and atomic weight of aluminum are 2.70 g/cm3 and 26.98 g/mol respectively.
Convert the composition of the following alloy from atom percent to weight percent (a) 44.9 at% of silver, (b) 46.3 at% of gold, and (c) 8.8 at% of Cu.
One end is insulated and the other exchanges heat by convection. Write the heat equation and boundary conditions for steady state two-dimensional conduction.
Call S(m) the entropy of the coffee beans when they are distributed between m cups. --- What is ?S = S(21) - S(5), the difference in entropy between when there are 21 cups and when there are 5 cups?
Plot the magnitude of the transmitted force as a function of operating speed in rpm, assuming a unit force amplitude. On the same plot, re-plot the transmitted force if instead the damping ratio cha
Determine (a) the rate power is developed, in kJ per kg of air flowing, and (b) the rate of entropy production within the turbine, in kJ/kg per kg of air flowing.
The water is then cooled at constant pressure, causing the specific internal energy to decrease by 750 kJ/kg. What is the specific volume of the water after the cooling process?
a 16 g hypodermic needle has a nominal inner wall diameter of 1.65 mm and a 30 g hypodermic needle has a nominal inner wall diameter 0.311 mm.
For environment conditions of 100 kPa and 25 °C, determine (a) the exergy of argon at the inlet, (b) the energy destruction during the process, and (c) the second-law efficiency.
Explain how you can experimentally measure Poisson's ratio of isotropic materials. Explain why thermoplastic polymers typically exhibit higher toughness than thermosetting polymers.
Given the total house space is 500 m^3, the air density is 1.25 kg/m^3, and the air specific heat is 1.0 kJ/kg-K. Will the room temperature increase or decrease? Determine the room temperature chang
The collector transfers heat by natural convection to the air with a heat transfer coefficient of 3.2 Btu/h.ft2. degree F and also transfers heat by radiation to the sky. Calculate the total heat lo
A photomicrograph was taken of a specimen at a magnification of 100X, and it was determined that the average number of grains per square inch was 200.
Compute the concentration of Li (in wt%) that is required. Assume that the respective densities of Li and Al are 0.534 and 2.71 g/cm3.
Given that the densities of C and Fe are 2.25 and 7.87 g/cm3, respectively, what is the concentration of carbon (in kg/m3) in the alloy?
Gold forms a substitutional solid solution with silver. Calculate the number of gold atoms per cubic centimeter (in atoms/cm3) for a silver-gold alloy that contains 19.0 wt% Au and 81.0 wt% Ag.
What is the average density of this solid solution? What is the average atomic weight? C) What is the volume of the unit cell in cm3? D) What is the unit cell dimension in cm?
Gold forms a substitutional solid solution with silver. Compute the weight percent of gold that must be added to silver to yield an alloy that contains 5.5 × 1021 Au atoms per cubic centimeter
Niobium forms a substitutional solid solution with vanadium. Compute the number of niobium atoms per cubic centimeter for a niobium-vanadium alloy that contains 27 wt% Nb and 73 wt% V.