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3/107 The power unit of the post-hole digger supplies a torque of 4000 lb-in. to the auger. The arm B is free to slide in the supporting sleeve C but is not free to rotate about the horizontal axis of C. If the unit is free to swivel about the vertical axis of the mount D, determine the force exerted against the right rear wheel by the block A (or A'), which prevents the unbraked truck from rolling. (Hint: View the system from above.)
a metal matrix composite mmc is made of a 2024 al alloy matrix and continuous nbspboron fibers. the boron fibers are
A solid round aluminium rod (made of 6061-T6) has a mean yield strength Sy = 40.0 ksi with standard deviation of 4.0 ksi, the rod is to be subjected to a mean static axial load of P = 25 kip with a standard deviation of 2.5 kip. Assume the yield stre..
Methane gas is compressed at the rate of 3x104 m3/hr (as measured at 0.1013 MPa and 15C) from 0.69 MPa and 26.7C to 3.45 MPa. The compressor operates adiabatically and has an efficiency of 80%. After compression, the methane is colled at a constant p..
At what equivalence ratio for octane-air mixtures does the carbon to oxygen ratio of the system equal one? Why is this of interest?
Air enters a one-inlet, one-exit control volume at 6 bar, the pressure is 3 bar, the temperature is 456.5 K, and the velocity is 300 m/s. The air behaves as an ideal gas for steady-state operation, determine: (a) the mass flow rate in kg/s (b) the ex..
the members of the truss shown can withstand a maximum compressive force of 800 lb and a maximum tensile force of 2000
an adiabatic gas turbine expands air at 1300 kpa and 500oc to 100 kpa and 127oc. air enters the turbine through a
the total solidification times of three casting shapes are to be compared 1 a sphere with diameter 10 cm 2 a cylinder
five kilograms of water initially a saturated vapor at 100 kpa is cooled to saturated liquid while the pressure is
steam enters a converging-diverging nozzle operating at steady state with p1 40 bar t1 400oc and a velocity of 10 ms.
Two units communicate with each other at 120 MHz and 10 W, in free space. Unit A uses a half-wavelength dipole antenna placed as shown in Figure. Unit B uses a 1/100 wavelength long dipole antenna and is 10 km from the transmitting antenna as show..
propane is to be burned with 15.0 excess air. before entering the furnace the air is preheated from 32f to 575f. at
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