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The force F required to compress a spring a distance x is given by F - Fo = kx where k is the spring constant and Fo is the preload. Determine the work required to compress a spring, whose spring constant is k = 37 kN/m, a distance of 2 cm starting from its free length (i.e., Fo = 0 kN). Also, determine the power required, in Watts, to compress the spring in 0.5 seconds. Please draw a picture that illustrates the problem.
a heavy inverted cylinder of length l and radius r is initially held above the surface of the ocean density of sea
two streams of air mix in a constant-area mixing tube the primary stream enters the mixing tube at station 1 with a
For this same component and alloy, compute the stress level at which fracture will occur for a critical internal crack length of 6.0mm.
consider a 210mw steam power plant that operates on a simple rankine cycle. steam enters the turbine at 10mpa and 500oc
refrigerant 134a undergoes a process for which the pressure-volume relation is pvn constant. the initial and final
consider a steam engine turbine in which steam enters at 10.45 mpa and 780 k with a flow rate of 38.79 kgs. a portion
Determine the total heat transfer and the total work(kj). and show the T-V diagram.
A piston-cylinder arrangement holds a thermally perfect gas at p1=100kPa and T1 = 300K. Assume that cp = 1.0035 kJ/kg-K, cv = 0.7165 kJ/kg-K, and R = 0.287 kJ/
a hot water stream at 80o c enters a mixing chamber with a mass flow of 0.5 kgs where it is mixed with a stream of cold
Air with free-stream velocity of 2m/s passes over a flat plate of length 5m and width 1m. This time, the temperature of the convecting air is Tinfinity = 350K and its relative humidity is 15%. The flat plate is at Ts = 300K and its surface is wetted,..
While visiting San Diego, you find an old milk pitcher at the thrift shop and suspect that it is valuable because the metal is really soft, like most noble metals. You know that silver and platinum look similar, but have way different thermal conduct..
the inner and outer glasses of a 1.2-m x 1.2-m double pane window are at 150c and 90c respectively. if the 6-mm space
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