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A long power transmission cable is buried at a depth (ground to cable centerline distance) of 2 meters. The cable is encased in a thin-walled pipe of 0.1-meter diameter, and to render the cable superconducting (essentially zero power dissipation), the space between the cable and pipe is filled with liquid nitrogen at 77 K. If the pipe is covered with a super-insulator (ki = 0.005 W/m-K) of 0.05-meter thickness and the surface of the earth (kg = 1.2 W/m-K) is at 300 K, what is the cooling load in W/m that must be maintained by a cryogenic refrigerator per unit pipe length?
Discuss the factors beyond crystal structure, quenching and temperature that affect he results of a specimen in a Charpy V notch impact testing.
when a 2000 lb vehicle is empty the static deflection of its suspen- sion system is measured as 0.8 in. what is the
a male reactor operator receives a whole body dose equivalent of 0.96 rem over a period of one week while working with
a 30-cm-diameter 5-m-long steam pipe passes through a room where the air temperature is 20 c. if the exposed surface of
the critical resolved shear stress of a bcc metal is 7 mpa. a single crystal of this alloy is the 0 0 1 direction.
a heavily insulated piston-cylinder device contains a gas which is initially at 5 bars and 187 degc and occupies 0.1
A two capacity process tank is to be analyzed using proportional and integral controllers. A process could be a steam jacketed kettle as shown in Figure.1.Water is heated continuously by the steam flow and it is proposed to use a controller to regula..
an empty parallel plate capacitor is connected between the terminals of a 3.1-v battery and charged up. the capacitor
high pressure steam steam 1 at a rate of 1000kgh initially at 3.5 mpa and 350 c is expanded in a turbine to obtain
how long is required for half the ice cube to melt? State clearly all the assumptions you make in formulating your model of this problem.
Find the desired radius and mass of the absorber if the absorber is to not exceed an angular deflection amplitude of 30 degrees when the engine is running at 750 rpm.
suppose that you want to design a column to support a uniform compressive stress stress naught. if the columns cross
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