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A 50-cm diameter pipeline in the arctic carries hot oil at 30 degrees celsius and is exposed to a surrounding temperature of -20 degrees celsius. A special powder insulation 5 cm thick surrounds the pipe and has a thermal conductivity of 7 mW/(m x degees celsius). The convection heat-transfer coefficient on the outside of the pipe is 9 W/(m^2 x degrees celsius). Estimate the energy loss from the pipe per meter of length.
a motorist enters a freeway at 36 kph and accelerates uniformly to 90 kph. from the odometer in the car the motorist
consider a one-dimensional plane wall with constant properties and uniform internal generation qdot. the left face is
a boat travels at a constant speed of 15 ms around the circumference of a half circle in a time span of 45 s. what is
determine the shortest time possible for the rear wheel drive 2 mg truck to achieve a speed of 16 ms with a constant
How much work(J)is done in a natural rubber filament when strains slowly and non reversely to a= 2?
a simply supported beam of length 18 ft. is subjected to a trapezoidally distributed load that has a value of 3 kipft
a 3-lb collar can slide on a horizontal rod which is free to rotate about a vertical shaft. the collar is intially held
thermal convection in the presence of heating can be modelled bydtdt u dtdx v dtdy qcp k d2tdx2 d2tdy2 all are
A circular shaft is subjected to a torque Ta and a bending moment Ma. Assuming that the diameter of the shaft is d, determine the expressions for the principal stresses and maximum shear stress in terms of Ma, Ta and d.
consider a steam turbine in which the steam enters at 23.26 mpa and 808 k with a flow rate of 17.78 kgs. the steam
a cam is to be disinged for an automated part loader1 rise 50mm in 1.5 sec usisng the constant velocity motin scheme.2
the lifetime of a lightbulb is normally distrbuted with a mean of 1000 hrs and a standard deviation of 30 hours. find the probability that a randomly selected light bulb last longer than 1045 hours.
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