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A square aluminum plate 5 mm thick and 200 mm on a side is heated while vertically suspended in quiescent air at 40C. (A) Determine the average heat transfer coefficient for the plate when its temperature is 15C by two methods: using results from the similarity solution to the boundary layer equations, and using results from an empirical correlation. (B) Calculate the convective heat transfer loss to the air from both surfaces (C) Calculate the net radiation heat loss to a very large environment at 35C. Assume it is a two surface enclosure and all surfaces are gray and diffuse. e=1.0. Do you think you can neglect the radiation heat loss?
the elastic modulus of diamond is measured by applying a force parallel to the body diagonal of the unit cell and
An iceberg with specific gravity (SGice) of 0.92 is partially submerged in seawater whose specific gravity is SGw= 1.025. Determine the relative volume of the iceberg that appears above the surface of the sea.
determine (a) the reaction at end A and B , (b) the minimum required cofficient of static friction at end A
a 2 m3 tank containing nitrogen at 25oc and 500kpa is connected through a valve to another tank containing 3kg of
use the principle of angular momentum to eventually derive the moment of inertia integral. for each case find the
two slender rods of negligible weight are pin-connected at a and attached to the 18-lb block b and the 80-lb block c as
a combined gas-vapor power plant operates as shown in fig.9.94. pressure and temperature data are given at principal
Knowing that the modulus of elasticity of brass is 105 GPa, determine the magnitude of the load P for which the deflection of the plug is 1,25 mm downward.
a circular specimen of mgo is loaded using a three-point bending mode. compute the minimum possible radius of the
a symmetrical wedge having a total vertex angle of 60 degrees is traveling at mach number of 3 at an altitude of 15 km.
a link AC has uniform rectangular cross section 3mm thick and 25mm wide. Determine the normal stress in the central portion of that link? solution
draw a schematic of band structure of a compound that has s and p orbitals occupied. show where is the fermi energy and
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