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A sheet of BCC iron 1.7-mm thick was exposed to a carburizing atmosphere on one side and a decarburizing atmosphere on the other side at 725°C. After having reached steady state, the iron was quickly cooled to room temperature. The carbon concentrations at the two surfaces were determined to be 0.014 and 0.0072 wt%. Calculate the diffusion coefficient if the diffusion flux is 3.0 × 10-8 kg/m2-s, given that the densities of carbon and iron are 2.25 and 7.87 g/cm3, respectively.
an air standard otto cycle has a compression ratio of 9.5. at the beginning of the isentropic compression the working
Calculate the theoretical density of FCC Copper, which has an atomic radius of 0.128 nm and the atomic weight of 63.55 g/mol.
the a-36 steel axle is made from tubes ab and cd and a solid section bc. it is supported on smooth bearings that allow
A hydraulic system is powered by a 9 kw motor and operates at 11 MPa. Assuming no losses, what is the flow rate through the system in units of m³/s?
a pelton wheel is used to produce hydroelectric power. the average radius of the wheel is 1.83 m and the jet velocity
argon gas enters a turbine operating at steady state at 100 bar 325 k and expands adiabatically to 40 bar 235 k with no
a ball is shot vertically into the air 50 m/s 108m from the ground. 6 seconds later, another ball is shot vertically into the air 20 m/s 58m from the ground. Find the distance where they meet in the air from the ground.
a system consists of 2 kg of water at 100 degrees c and 1 bar. determine the exergy in kj if the system is at rest and
Note that the positive y direction is downward and counterclockwise torques are positive. find alpha the angular acceleration?
today you have a savings account of 15 620. based on an annual interest rate of 4.2 what equal amount can you withdraw
a tank open to the atmosphere initially contains 2 lb of liquid water initially at 80degf and 0.4 lb of ice initially
the city of houston has a water filtration system that consists of a large rigid tank with a single 1.5m diameter inlet
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