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a horizontal 25-mm diameter cylinder is maintained at a uniform surface temperature of 35degc a fluid with a velocity
a vertical array of circuit boards of 150-mm height is to be air cooled such that the board temperature does not exceed
a probe used to measure the velocity of air in a lowspeed wind tunnel is fabricated of an l 100 mm long d 8-mm
determine the heat transfer rate from the steel plates of problem 724 accounting for free convection from the plate
an experiment involves heating a very small sphere that is suspended by a fine string in air with a laser beam in order
square panels 250 mm times 250 mm with a decorative highly reflective plastic finish are cured in an oven at 125c and
a garment soaked with water is hung up to dry in a warm room at atmospheric pressure the still air is dry and at a
a water bath is used to maintain canisters containing experimental biological reactions at a uniform temperature of
questionan apartment with four people located in the third floor the height from the ground to the apartment is 6 m a
on a very still morning the surface temperature of a lake used to cool the condenser of a power plant is 30degc while
the surface of a horizontal 7-mm-diameter cylinder is maintained at an excess temperature of 5c in saturated water at 1
a sphere made of aluminum alloy 2024 with a diameter of 20 mm and a uniform temperature of 500c is suddenly immersed in
copper tubes 25 mm in diameter and 075 m long are used to boil saturated water at 1 atma if the tubes are operated at
a determine the tube wall temperature ts and the gas outlet temperature tmo for the prescribed conditions as a first
a steel bar 20 mm in diameter and 200 mm long with an emissivity of 09 is removed from a furnace at 455degc and
the bottom of a copper pan 150 mm in diameter is maintained at 115degc by the heating element of an electric range
water at atmospheric pressure boils on the surface of a large horizontal copper tube the heat flux is 90 of the
calculate the critical heat flux on a large horizontal surface for the following fluids at 1 atm mercury ethanol and
saturated ethylene glycol vapor at 1 atm is exposed to a vertical plate 300 mm high and 100 mm wide having a uniform
a vertical plate 25 m high maintained at a uniform temperature of 54degc is exposed to saturated steam at atmospheric
as strip steel leaves the last set of rollers in a hot rolling mill it is quenched by planar water jets before being
a tube of 2-mm diameter is used to heat saturated water at 1 atm which is in cross flow over the tube calculate and
1 saturated steam at 1 atm condenses on the outer surface of a vertical 100-mm-diameter pipe 1 m long having a uniform
saturated steam at 01 bar condenses with a convection coefficient of 6800 wm2 k on the outside of a brass tube having
electrical current passes through a horizontal 2-mmdiameter conductor of emissivity 05 when immersed in water under