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A flat belt is used to transmit a couple from drum B to drum A. Knowing that the coefficient of static friction is 0.40 and that the allowable belt tension is 450 N, determine the largest couple that can be exerted on drum A.
We wish to design an automatic speed control for an automobile. Assuming that pure integral control (that is, no proportional term) is advantageous; select the feedback gain so that the roots have critical damping (? = 1).
the spring mounted slider moves in the horizontal guide with negligible friction and has a velocity vo in the
calculate the position of the quasi-Fermi levels for electrons and holes with respect to the intrinsic level (assume that ni=1.5x10^10cm^-3).
write the temperature of a cooling body as an exponential function of time. Is Newton's Law of Cooling still widely accepted? Are there any substitutes?
A constant force of F is applied to a block of weight w located on an inclined surface with angle of and friction coefficient u. A spring is acting on the block with constant K. if initially spring was compressed by distance d. Find velocity of block..
a 50-cm diameter pipeline in the arctic carries hot oil at 30 degrees celsius and is exposed to a surrounding
refrigerant 134a is compressed with no heat transfer in a piston- cylinder assembly from 30 lbfin2 20 degrees f to 160
A force P in the xy-plane acts on the triangular plate. The moments of P about points O, A, and B are MO =80 N · m counter clockwise, MA =200 N · m clockwise, and MB =0. Determine P.
A “Pumpkin Chucker” design for the annual Punpkin Chunkin competition held near Millsboro, Delaware every fall (first week of November) uses a pneumatic launcher (air cannon) to throw its pumpkin. It is important to know if your “ammunition”, the pum..
A turbine is supplied with 0.6 m3 /s of water from a 0.3 m diameter pipe. The discharge pipe is 0.4 m in diameter. Determine the pressure drop across the turbine if it delivers 60 kW of power.
What is the charge density of a uniform infinitesimally thin spherical shell shell of Radius R and total charge Q which is centered at the origin.
An air conditioning unit has two inlet air streams: a stream of return air from the building (2.25 kgs at 25C) and a steam of outside air (0.75 kg/s at 30 C). These streams are blended and then colled by a cooling coil to 20 C.
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