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Consider heat transfer through a wall comprised of two solid layers, each 4m x 4m. When perfect contact is maintained between the layers, the steady state temperature profile across the wall might look like that shown below, in Figure 1. If the layers are not in perfect contact, the steady state temperature profile might look like that shown below in Figure 2. For the case of Figure 2, assuming that the bulk temperature in the air gap equals the average of the temperatures at each solid surface in contact with it, what is the temperature drop from surface 1 to surface 2? The product of the Grashof and Prandtl numbers evaluated in the air gap is 106, and the thermal conductivity of air can be taken as 0.028 W/m °C
a round casting is 0. 2 m in diameter and 1 m in length. another casting of the same metal is elliptical in cross
experiment can be used to investigate heat transfer associated with flow past cylindrical tubes either in isolation or
A radial vortex in water rotates at a speed of 3 radians/sec. The center of the vortex is also moving downstream at a linear velocity of 2 ft/sec. Create a plan-view plot that shows the path line of a fluid particle that rotates at a fixed radius of ..
XYZ manufacturing department holding training class for all workforces due to safety and security concern. The average training day on the program is 50 days and the normally distributed random variable with standard deviation of 10 days.
a car starts from rest and accelerates at a constant rate until it reaches 85 mihr in a distance of 110 ft at which
a hand drill is used to drill a holbein a very hard material. because the bit is very dull it spins with out advancing.
find the free-fall velocity of an 8.5-in-diameter sphere bowling ball weighing 16 lb falling through the following
Methane gas in a piston-cylinder assembly goes under an adiabatic (no heat transfer) quasi- equilibrium compression. (This process is called isentropic process). The pressure and volume of the gas during the process are related as PV 1.3=constant.
consider a large 3 cm thick stainless steel in which heat is generated uniformly at a rate of 5106 wm3. assuming the
the block b is suspended from a cable that is attached to the block at e wraps around three pulleys and is tied to the
a certain material 2.5 cm thick with a cross-sectional area of 0.1 m2 has one side maintained at 35oc and the other at
what is the gauge pressure of the gas in this mercury manometer if h 81 mm and the atmospheric pressure is 773 mmhg?
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