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A very long rod 5 mm in diameter has one end maintained at 100°C. The surface of the rod is exposed to ambient air at 25°C with a convection heat transfer coefficient of 100 W/m2 · K.
1. Determine the temperature distributions along rods constructed from pure copper, 2024 aluminum alloy, and type AISI 316 stainless steel. What are the corresponding heat losses from the rods?
2. Estimate how long the rods must be for the assumption of innite length to yield an accurate estimate of the heat loss.
The stators in a gas turbine are designed to increase the kinetic energy of the gas passing through them adiabatically. Air enters a set of these nossels at 270 psia and 795 F with a velocity of 97 ft/s and exists at 200 psia and 550 F. Calculate the..
consider laminar parallel flow past an isothermal flat plate of length l providing an average heat transfer coefficient
an air conditioner in the airport of timbuktu runs a cooling system using r-410a with a high pressure of 1500 kpa and a
Show that the specific heat at saturation of a liquid phase of mass m (defined by Cf= (deltaQ/m)dt is generally not the same as the specific heat at constant pressure of the saturated liquid.
A window-mounted room air conditioner removes energy by heat transfer from a room and rejects energy by heat transfer to the outside air. The air conditioner cycle requires a power input of 0.434 kW and has a coefficient of performance of 6.22.
a pure jet engine propels an aircraft at 240 ms through air at 45 kpa and -13 c. the inlet diameter of this engine is
What is the kinetic energy (in Btu) associated with a 300 gm hockey puck flying at 120 mph? Assuming an ideal gas, calculate the specific volume in the appropriate units for (6 pts) : a. N 2 at 500 kPa and 900 K b. Neon at 8 kPa and 250 K c. Air at 1..
a new containment vessel for nuclear waste is being tested by a group of engineersnbspworking for the u.s. department
in a constant-pressure process steam at a 100 psia is presented to the piston of a pump and causes it to travel 3 in.
an orifice meter is installed in a 12 foot ductile iron pipe carrying water at 60 deg f. a mercury manometer is used to
a car engine produces 136 hp on the output shaft with a thermal efficiency of 30. the fuel it burns gives 35000 kjkg as
a balanced wheel supported on springs is rotating at 1200 rpm. if a bolt weighing 15 g and located 5 cm from center
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