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The inner surface of a plane brick wall is at 40°C and the outer surface is at 20°C. Calculate the rate of heat transfer per m 2 of surface area of the wall, which is 250 mm thick. The thermal conductivity of the brick is 0.52 W/mK.
A glass ball of radius 2.00 cm sits at the bottom of a container of milk that has a density of 1.03 g/cm3. The normal force on the ball from the container's lower surface has magnitude 9.48 x 10-2 N. What is the mass of the ball?
A combined vapor power cycle consists of two ideal Rankine cycles with cesium and steam as the working fluids. In the caesium cycle, saturated vapor caesium enters the turbine at100 psia, and saturated liquid exits the condenser at 740ºF. Relevant pr..
three horizontal forces are applied as shown to a vertical cast-iron arm. determine the resultant of the forces and the
A Siemens SWT-2.3-82 wind turbine has a rated capacity of 2.3 MW and a rotor diameter of 82.4 meters. The wind turbine has cut-in and cut-out speeds of 5 m/s and 27.5 m/s, respectively and is rated at a wind speed of 17.5 m/s.
an insulated piston-cylinder device contains 5 l of saturated liquid water at a pressure of 200 kpa. an electric
The following is a diagram shows refraction of a light beam at the interface of two media. The incidence and refraction angles are measured to be 45 deg and 30 deg respectively. Will total reflection happen when the light beam shins from the top to t..
a small sphere of reference-grade iron with a specific heat of 447 jkgk and a mass of 0.515 kg is suddenly immersed in
a for a rectangular coordinate system we developed the navier stokes equation for vx. now reduce that equation to
a solid cube of wood having dimensions of 0.5 m3 is floating in water with 0.3 m of its dimension above the surface.
a cylindrical aluminum specimen having an original diameter of 12.8 mm 0.505 in. and gauge length of 50.80 mm 2.000 in.
A stream containing 57 mol % n-Octane and the remainder Ethylene is to be separated by flash distillation. The molar flow rate of the stream is 823 mol/hr. The temperature and pressure of the stream entering the flash drum are 105°C and 325 kPa. De..
water is the working fluid in an ideal rankine cycle. the condenser pressure is 6 kpa and saturated vapor enters the
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