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A woodcutter wishes to cause the tree trunk to fall uphill, even though the trunk is leaning downhill. With the aid of the winch W,what tension Tin the cable will be required? The 1200-lb trunk has a cen- ter of gravity at G.The felling notch at Ois suf?- ciently large so that the resisting moment there is negligible.
air is moving between two parallel plates at 40c and 6.667 ms. what is the minimum distance h between the plates so
The gases assumed to have the properties of air, enter at 200°C and leave at 93°C. The overall heat transfer coefficient is 180 W/m2 · K, using the effectiveness-NTU method calculate the area of the heat exchanger.
a helium gas is heated at constant volume from 100kpa 300k kelvin to 500k. a following process expands the gas at
a specimen is originally 1 ft long has a diameter of 0.5 in. and is subjected to a force of 500 lb. when the force is
a cubic tank 1m3 is filled with air at 280k and 100 kpa. it is fitted with a relief valve that will vent at 600 kpa.
a rigid well-insulated tank contains a two-phrase mixture of ammonia with .0025ft3 of saturated liquid and 1.5 ft3 of
A rectangular material sample (2 in tall and 1 in wide) is subjected to a vertical tensile stress of 50,000 psi on its upper edge. The bottom edge of the sample is constrained from displacing in the vertical, or y, direction but is free to expand or ..
Gadolinium metal undergoes a polymorphic phase transformation from HCP to BCC upon heating at 1260oC. The lattice parameters for the HCP phase are a=0.3745 nm and c=1.18525 nm. The lattice parameter for the BCC phase is 0.4060 nm. Calculate the densi..
in a cogeneration scheme a diesel engine-generator is used. the diesel engine-generator is rated at 2000 kwe. the
a steam power plant operates with a boiler output of 20 kgs steam at 2 mpa 600degc. the condenser operates at 50degc
For an assembly line, you need to design a linkage that moves a point P in approximately a straight line over a distance of 24” in one second. It is also specified that P must return from the endpoint back to the starting point in five seconds, givin..
What is the driving force for steady-state known that the concentration of nitrogen in the steel at the high-pressure surface is 2 kg/m3. How far into the sheet from this high pressure side will the concentration be 0.5 kg/m3? Assume a linear con..
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