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An electronic chip internally generates 1.5 Watts of heat energy that must be dissipated to ensure its reliable operation. A fan, with an exposed area of 10cm^2 is attached to the chip so the heat can be transferred away by convection. Given the surrounding air temperature is at 15 C and the heat transfer co-efficient of the fan is 50 W/m^2/K, what temperature will the chip be operating at when the fan is transferring the required 1.5 W.
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Assume the lubricating fluid is changed to oil with a dynamic viscosity of 1.4X10E-3 lbf-s/ft^2. Now what air pressure, in psig, is required to overcome shear force ? Use the same lift rate of 0.1 ft/sec.
The arrival rate at a parking lot is 6 veh/ min. Vehicles start arriving at 6: 00 P. M., and when the queue reaches 36 vehicles, service begins. If company policy is that total vehicle delay should be equal to 500 veh-min
If the HCO3- alkalinity of a sample was 50 mg/l as CaC03, what would its alkalinity be in terms of NaCl equivalents
IN in-situ bioremediation ,an electron donor such as acetateis typically added and is oxidized to provide the electrons for thereduction of CCl4, in ground water devoid of oxygen ,nitrate typically serves as the electron acceptor.using data fromhalf ..
One cubic metre of nitrogen at 40 degrees Celsius and 340KPa is compressed isothermally to .2(m^3). What is the pressure when the nitrogen is reduced to this volume. What is the modulus of elasticity at the beginning and end of the compression.
a wheel tractor scraper weighing 100 tons is being operated on a haul road which is now packed. this tractor is traveling fully loaded up a 6% slope to the dump site which is 0.5 miles away. the return trip is level and is also 0.5 miles away.
At a section in a beam the tensile stress due to bending is 70 N/mm 2 and there is a shear stress of 25 N/mm 2 . Determine from first principles, the magnitude and direction of the principal stresses and calculate the max shear stress.
HJ Heinz Corporation is constructing a distribution facilityin Italy for products such as Heinz Ketchup, Jack Daniel's Sauces,HP steak sauce, and Lea & Perrins Worcestershire sauce. A15-year life is expected
Analyze the stability of the dam shown in the figure, if the friction coefficient between concrete and foundation is 0.70, and the specific weights of concrete and water are 24kN/m 3 and 10kN/m 3 , respectively.
According to the Owner's Manual for the Gateway Arch by William Thayer, the construction made use of the following mathematical equation. y(x) = a + b * cosh( c * x) a= 693.8597 b= -68.7672 c=.010033
What annual investment is required at 8% per year compounded annually to accumulate to $100,000 at the end of 20 years?
The block is acted by its weight W=200 lb, a horizontal force Q=600 lb, and the pressure P exerted by the inclined plane. The resultant R of these forces is up and parallel to the inclined thereby sliding the block up it. Determine P and R.
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