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Consider laminar flow of a fluid with Pr = 4 that undergoes a combined entrance process within a con- stant surface temperature tube of length L xfd,t with a flow rate of m. An engineer suggests that the total heat transfer rate can be improved if the tube is divided into N shorter tubes, each of length LN = L/N with a flow rate of m/N.
Determine an expression for the ratio of the heat transfer coefficient averaged over the N tubes, each experiencing a combined entrance process, to the heat transfer coefficient averaged over the single tube, hD,N /hD,1.
a dishwasher circulates water at a rate of 55 gpm with a small pump. the total head ppg v22g leaving the pump is
the average accelerations of a us navy fighter jet takeoff to an us air force fighter jet takeoff are very different.
helium at atmospheric pressure and 30 degc flows across a square plate at a free stream velocity of 15 ms. calculate
air is contained in a vertical piston-cylinder assembly by a piston of mass 50 kg and having a face area of 0.01 m2.
a moving particle encounters an external electric field that decreases its kinetic energy from 8830 ev to 7750 ev as
a steam power plant has a high pressure of 5 mpa and maintains 50 c in the condenser. the boiler exit temperature is
r.c had earnings per share of 8 in year 2010 and it paid 4 dividend. book value per share at years end was 80. during
a hub and shaft are said to meet satisfactory fit if the clearance between the two is between 0.03 and 0.18 mm. the
a water balloon launcher uses two bungee cords each of effective spring constant 125 nm stretched a distance of 0.8 m
The odd parity bit for all data received since the circuit was reset. This output should be 0 the clock cycle after a reset since no zeroes or ones have been received by the circuit at that point.
A flow rate transmitter specification is given as following: Input range: 0 to 300 GPM (Gallons Per Minute) Output range: -5V to 5V. If this transmitter needs to be connected to an A/D converter and the requirement is to detect at least 0.25 GPM diff..
A CO2 laser provides a constant surface heat flux, qs|| =200W/m2 to the surface of a 1m-thick plywood wall, initially at 300K - the other wall surface is adiabatic. What is the temperature on the heated surface of the wall after 100s? Check the Fouri..
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