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A hot fluid at 35°C is to be transported through a tube horizontally positioned in quiescent air at 25°C. Which of the tube shapes, each of equal cross-sectional area, would you use in order to minimize heat losses to the ambient air by free convection?
Use the following correlation of Lien hard (Int. J. Heat Mass Transfer, 16, 2121, 1973) to approximate the laminar convection coefficient for an immersed body on which the boundary layer does not separate from the surface, Nu1 = 0.52Ral1/4. The characteristic length / is the length of travel of the fluid in the boundary layer across the shape surface. Compare this correlation to that given for a sphere to test its utility.
Toroidal coil of square cross section with N turns carrying current I. The inner radius is a, the outer radius is b. Height of the toroid is h. Solve for magnetic field density and magnetic flux everywhere in space. Find vector potential, A, of th..
consider a n ch enchancement mode mosfet with the following parameters:vtn=0.6v,w=5 um,l=0.5um,un=750 cm2/v-s,tox=0.02um,and Eox=(3.9)(8.85x10^-14)F/cm. when the transistor is biasedwith Vds=0.8v and 3.0v,a)determine the current when the gate is bi..
MOS (p and n) npn and pnp transistors with parameters given in the text or select your own by using industrial data sheets, available on the internet. Also resistors, capacitors, and power supplies (10 V, 5 V, and 3.3 V) are available.
On a frictionless table, a glob of clay of mass 0.220 kg strikes a bar of mass 0.600 kg perpendicularly at a point 0.150 m from the center of the bar and sticks to it. If the bar is 1.380 m long and the clay is moving at 8.700 m/s before striking ..
Design a state graph and state table for a Moore sequential circuit that has two inputs (X1 and X2) and one output (Z). The output begins at 0 and becomes 1 when X1 = 1 and X2 = 1, either concurrently or one after the other
A homogeneous wire is bent into the shape shown. Determine by direct integration the x coordinate of its centroid. Express your answer in terms of a.
Executes a JSR instruction
The temperature of water in a 25 gallon water heater is supposed to be raised from 60 deg F to 125 deg F. Compare the cost of using electricity and natural gas to heat the water.
An overhead line with an inductance of 1.33 mH/km and capacitance of 8.34 nF/km is connected to an underground cable with an inductance of 0.266 mH/km and capacitance of 166 nF/km.
A series circuit consisting of a 0.398-henry inductor and a 212-µF capacitor is connected to a 125-volt variable frequency source. At what frequency will the circuit take a lagging current of 2.5 A a leading current of 2.5 A
The current in the bias resistors should be no more than 10 percent of the drain current- Determine VGS, ID, and VDs. Sketch the load line and plot the Q- point.
Determine the frequency response of this receptor to stretching. There are devices that can apply sinusoidal stretch to a small segment of tissue.
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