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Over a flat portion of the salt lake bed in Utah, the wind can blow at a relatively steady velocity of 9.6 m/s. The flat portion has a length of 118 m, and the air temperature is 20 °C. During the summer the lake bed can reach a temperature of 60 °C. Ignoring natural convection, compute the average heat flux over the flat portion of the lake bed. What would be the energy flux (J/m2) if the conditions are held steady over a 3.8-hour period? Table of thermal properties of air at 1 atm.
during a constant-pressure process it is found that the change in entropy is equal to 0.25cp. if the cp is constant and
an emergency fire control system on a public building has a pressurized tank on top of the bulding and is connected
a large storage tank contains 500000 l of milk. milk enters the tank through a 0.05 m diameter pipe at a velocity of 3
estimate the tensile strength of the wire and the work required to take 1m3 of the wire to the point of necking. the
A fireclay brick cube, 10 cm in length is removed from a furnace where it was maintained at a temperature of 500 degrees C. The brick cube is then placed in ambient temperature conditions.
determine the expressions for attractive and repulsive energies, EA and ER as a functions of r where r is in nm and E is in eV.
a closed gas turbine unit uses neon as the working fluid. there are two stages of compression with intercooling from
1. the adiabatic compressor of a large gas turbine receives air from the ambient surroundings at 95 kpa and 20degc
what is a plasticizer? consider a polymer with a plasticizer. how the crystallinity of polymer will be affected by
determine the temperatures of surface 1 through 4 of the furnace cavity of example 13.3 if the entire furnace
the rigid gateoab of fig. p2.58 is hinged ato and rests against a rigid support atb. what minimum horizontal forcep is
a retarding force is applied to a body moving in a straight line so that during an interval of its motion its speed u
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