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In Chapter 3 we assumed that, whenever fins are attached to a base material, the base temperature is unchanged. What in fact happens is that, if the temperature of the base
(a) Assuming that the occupants' body heat provides a continuous source of 320 W within the igloo, calculate the inside air temperature when the outside air temperature is Too = -40 C. Be sure to consider heat losses through the floor of the igloo.
(b) Using the thermal circuit of part (a), perform a parameter sensitivity analysis to determine which variables have a significant effect on the inside air temperature. For instance, for very high wind con- ditions, the outside convection coefficient could double or even triple. Does it make sense to con- struct the igloo with walls half or twice as thick?
an airplane flies a straight course due east from city m to city n 644km away. the plane has an airspeed of 290 kmh.
a dish of liquid water is placed on a table in a room. after a while all of the water evaporates. taking the water and
a calculate the number of electrons in a small electrically neutral silver pin that has a mass of 8.0 g. silver has 47
water used in a power plant passes through a heat exchanger at a mass flow rate of 0.125 kgs and is cooled from 94degc
a boom for a crane is shown in the horizontal position. if w1kn determine the force for supporting memebers ac ab ad
a centrifuge is used to remove solids from a 14.0 ppg mud using 8.33 ppg water. the mud and water enter the centrifuge
would a flagpole made of steel or aluminum freeze ones tongue to it faster? why? thermal conductivity 2. the outer
What are the strategic options for legacy system evolution? When would you normally replace all or part of a system rather than continue maintenance of the software?
One half of a mole of air is taken through the following processes in a closed piston-cylinder arrangement. From the initial state (V1 = 10 L, p1 = 1 atm) the gas is expanded at constant pressure to a volume of 20 L. It is then heated at constant vol..
a well-insulated pump steadily delivers water at a volumetric flow rate of 0.05 m3s through an insulated pipe of a
air enters an insulated diffuser operating at steady state with a pressure of 105 nm2 and a temperature of 57 degrees
Select the proper heat exchanger from American Industrial Heat Transfer Inc. company. Check whether the pressure drop on the shell side is within allowable pressure drop of 20 psi.
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