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A storage tank consists of a cylindrical section that has a length and inner diameter of L=2 m and Di=1 m, respectively and two hemispherical end sections. The tank is constructed from 20-mm-thick glass (Pyrex) and is exposed to ambient air for which the temperature is 300 K and the convection coefficient is 10 W/m^2 *K. The tank is used to store heated oil, which maintains the inner surface at a temperature of 400 K. Determine the electrical power that must be supplied to a heater submerged in the oil if the prescribed conditions are to be maintained. Radiation effects may be neglected, and the Pyrex may be assumed to have a thermal conductivity of 1.4 W/m*K.
a paddle wheel is inserted in a 0.6 m3 rigid well-insulated tank which is filled with 2 kg of air. the paddle wheel
a helical spring of stiffness k is cut into two halves and a mass m is connected to the twonbsphalves as shown below
find the natural frequencies of oscillation of the double-pendulum below where m1=m2=m, and L1=L2=L.
the company you work for makes the casting for the rectangular pan 300 mm long x 200 mm wide x 60 mm deep with a 3 mm
a mass-spring-damper system has a mass of 100 kg. its free response amplitude decays such that the amplitude of the
an air conditioner is used to cool and dehumidify air. we will ignore the temperature aspect and model the air
Find the stoichiometric A/F ratio (by mass) for the combustion of benzene (C6H6). Compute the actual A/F ratio and do a wet and dry analysis of the products by volume at a mixture strength of 95%.
you are manufacturing a frame for a vehicle out of some aluminum alloy 6061-t451 tubing. the frame is to be welded
locate the initial and final states on a sketch of the T-v digram. determine the mass of vapor present at the initial and final state, each in kg.
a steel strut is pinned at both ends. the strut has a solid circular cross section and is 6 m long. the strut
the initial temperature is t 162 c air expands as an ideal gas from 10 bar and the above temperature to 1 bar in an
the 3000 lb car and the 4600 lb tow truck are stationary. the muddy surface on which the car rest exerts a negligible friction force on the car. what is the tension in the tow cable.
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