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If the specific surface energy is 0.4J/m2 and the modulus of elasticity for the material is 69GPA what is the maximum length of a surface flaw that is possible without fracture?
The water is stirred using an external motor until the substance is saturated vapor. Determine the work necessary to complete the process.
The substance is slowly heated at constant pressure until the temperature reaches 320C. Determine the work required to raise the weighted piston.
Sketch the following processes on P-V and P-T diagrams. Superheated vapor is cooled at constant pressure until liquid just begins to form.
If you have 3 force one of which the moment about point A ends up as 0, you add them to find the total moment. How do you find the distance away from point A of the application of the total force v
If the critical resolved shear stress is 18.2 MPa (3000 psi), will an applied stress of 40 MPa (6500 psi) cause the single crystal to yield? If not, what stress will be necessary?
Determine the time average R of the total aerodynamic and mechanical resistance to motion. neglect the loss of mass due to exhausted fuel compared with the mass of the sled.
Calculate the time average F of the total force tangent to the load exerted on the tires during the 8 s. Treat the car as a particle and neglect air resistance.
Take a cube and increase the length in one direction, then find the amount the other sides must decrease to conserve volume.
The inlet pipe has a 12 cm diameter, and the exhaust section is rectangular with dimensions of 0.6 m by 0.7 m. Calculate; a. The kinetic energy change b. The output power in kW.
To determine the quality of the steam, a throttle calorimeter is used, where a sample of the steam is throttled to atmospheric pressure (100 kPa) and temperature of 125oC. Determine the quality of s
For steady state conduction with no heat generation drive the radial temperature characteristics as a function of the radial distance from the center of the cylinder. Plot this characteristics as a
R-22, flowing steadily at 70 lbm/hr, enters the expansion valve of a refrigeration system as a saturated liquid at 183.09 psia. At the exit of the valve, the pressure is 31.162 psia.
A 10 cubic foot tank is initially evacuated and is then filled from a supply line which contains R-22 at 100 psi, 100 F. Assuming no significant heat transfer.
Kinetic and potential energy changes from the intlet to exit can be neglected. Determine the compressor power, in hp, and the volumetric flow rate at the exit in units of ft^3/min.
Heat loss from the nozzle per unit mass of steam are estimated to be 1.2 Btu/lbm. Determine the exit temperature of the steam.
Tin atoms are introduced into an FCC copper crystal, producing an alloy with a lattice parameter of 3.7589*10^-8 cm and a density of 8.722 g/cm^3. Calculate the atomic percentage of tin present in
Determine a) work produced per kilogram of air (kJ/kg) b) the change in entropy for the air (kJ/kg*K). Assume ideal gas, constant specific heat Cpo = 1.0035 kJ/kg*K Thanks for the help
Determine the smallest allowable value of the coefficient of static friction between a trunk and the floor of the baggage car if the trunk is not to slide.
Determine how many candy bars she needs to take with her. Assume that an average 68 kg adult consumes 639 Calories/hour while bicycling, and the energy content of a 20 g chocolate candy bar is 105 C
Consider 2 kg of austenite that contain 1.15 wt% of carbon. The alloy is cooled to 726C. What is the proeutectoid phase?
The quantities heat transfer and work are very different than the quantities pressure and specific volume. Briefly explain the major differences between there two important groups of thermal quanti
During the process, the pressure and specific volume are related by Pv=constant and the work has a magnitude of 32 kJ. Sketch the process on P-v diagram. Determine the heat transfer, in kJ.
Changes in kinetic and potential energies are negligible. Calculate the heat transfer per kilogram of nitrogen flowing through the heater. Assume that nitrogen behaves as an ideal gas.