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A thin long electric heater of width 20 cm is placed with its width oriented vertically. It dissipates heat by free convection from both sides of its surface into air at 20C. If the heater should not exceed 225C, determine the length of the heater in order to dissipate 1000 W safely
Find the magnitude of the acceleration at ((x,y,z,t=(-2,-1,1,0) Assume that u=0, v=0, find the position of the fluid particle along the z-axis as a function of time, what would be the position at time t=infinity?
a flat plate of 15x39 and 0.125 thick sits on an a pedestal that has a surface area of 80 in2 10x8. the plate centered
A specific point during the re-entry flight of the Space Shuttle has the following condition: Mach number of 15.93, static pressure of 20 Pa, and static temperature of 245 K. Assuming that air is a calorically perfect gas and that this condition is s..
a steel rod 20mm diameter is passesthrough a brass tube 25mm internal diameter and 30mm external diameter. the tube is
hydrogen gas at 35ordmc and unknown pressure state 1 enters a steady insulated system which has no work interaction
an equiangular strain gage rosette is mounted on a free and unloaded surface of a part made of steel. when loaded the
A flow of 1 kg/s air at 300 K is mixed with a flow of 2 kg/s air at 1500 K in an insulate pipe junction at a pressure of 100 kPa. Find the exit temperature and the energy destruction.
Is there an economic case for renewable energy? This issue was recently a "hot topic" in the news, and you are referred to the following newspaper article for a representation from the media.
Determine the time taken for the crate to come to a rest and the distance travelled if the coefficient of dynamic friction is 0.4
an ice chest is constructed of 0.4 mm thick plain-carbon steel plate a 1.9 cm thick layer of styrofoam k0.033 wm c and
1. air is compressed by a 30 kw compressor from p1 to p2. the air temperature is maintained constant at 25 oc
a thermoelectric generator consists of a series of semiconductor elements heated on one side and cooled on the other.
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