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What is the thickness required of a masonry wall having thermal conductivity 0.75 W/m · K if the heat rate is to be 80% of the heat rate through a composite structural wall having a thermal conductivity of 0.25 W/m · K and a thickness of 100 mm? Both walls are subjected to the same surface temperature difference.
a projectile is launched with a speed v0 27.0 ms from the floor of a 4.3-m-high tunnel as shown. determine the maximum
The permeability in the reservoir is a constant 200 mD. The pressure in the reservoir is 3000 psi. The reservoir is 100 m thick. A 6-inch well is drilled through the reservoir, which has two effects. First, the rock within 5 ft of the well is damaged..
a 2.0 kg of water at 90 deg. c and 1 bar is placed in a vertical cylinder and sealed with a massless piston. the piston
A quick return mechanism is to be designed with a time ratio=1.22 and a cycle time of 0.2sec. What is the required crank speed (rad/s)? What are theta 1 and theta 2?
Assuming nucleate boiling conditions calculate the temperature of the bottom surface of the pan.
A fan is to accelerate quiescent air to a velocity to 12 m/s at a rate of 3 m3/min if the density of air is 1.15 kg/m3, the minimum power that must be supplied to the fan is
Describe a physically-plausible situation where the Reynolds number is (a) 1 (b) 10,000 (c) 1,000,000. For flow in tubes/pipes/ducts, use Red For flow over/along long/blunt objects, use Rel.
determine the minimum power requirement for the pump.
solar energy is used to warm a large collector plate. this energy in turn is transferred as heat to a fluid in a heat
Find the real-valued velocity response v(t) = dx/dt. Is the output v(t) also a triangular wave? Explain briefly. What is the mean square velocity v^2.
A 24-tooth gear has AGMA standard full-depth involutes teeth with diametral pitch of 5. Calculate the pitch diameter, circular pitch, addendum, dedendum, tooth thickness and clearance. All dimensions must be taken to 4 decimal places to account for m..
a concentrating solar collector consists of a parabolic reflector and a collector tube of diameter d through which
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