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A simplified representation for cooling in very large-scale integration (VLSI) of microelectronics is shown in the sketch. A silicon chip is mounted in a dielectric substrate, and one surface of the system is convectively cooled, while the remaining surfaces are well insulated from the surroundings. The problem is rendered two- dimensional by assuming the system to be very long in the direction perpendicular to the paper. Under steady-state operation, electric power dissipation in the chip provides for uniform volumetric heating at a rate of q. However, the heating rate is limited by restrictions on the maximum temperature that the chip is allowed to assume.
For the conditions shown on the sketch, will the maximum temperature in the chip exceed 85°C, the maximum allowable operating temperature set by industry standards? A grid spacing of 3 mm is suggested.
a small air turbine with an isentropic efficiency of 80 should produce 270 kjkgof work. the inlet temperature is 1000 k
saturated steam at 110 c condenses on the outside of a 3-m long 7-cm-diameter thin horizontal copper tube by cooling
a liquid food is being heated in a tubular heat exchanger. the inside pipe wall temperature is 110degc. the internal
a thermocouple located at the center of a long circular duct with a 10cm diameter has a spherical bead of 2mm diameter.
High school Yr 12 aeronautical Engineering Module - mechanics, PLease help- i seem to get the incorrect answer but didn't know where i have gone wrong?
A speaker driver can be modeled as a one degree of freedom forced system with damping. The mass of the moving cone is m=0.1 kg and the spring k=50000N/m.
Air at 200 kPa enters a 2-m-Iong, thin-walled tube of 25-mm diameter at 150°C and 6 m/s Steam at 20 bars condenses on the outer surface.
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given 55 galloin water heater height 61 in. dia 21.5 in. surrounding insulation k0.03 btuft-hr deg. f tank is in
A size 4-0 (0.15mm diameter) monofilament nylon suture was tested for its stress relaxation properties using a micro-mechanical tester at room temperature. A 20 mm sample was stretched 2 mm over a 20 second period; the force-displacement curve for th..
one kilogram of water initially at 200 degc and 0.2 mpa undergoes an isothermal internally reversible compression
a beam of light is emitted in a pool of water from a depth of 69.7 cm. where must it strike the air water interface
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