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uiueSoUTTd u A cylindrical steel bar has length 2 m and a diameter of 20 cm....
. A cylindrical rod has a length of 30 cm and a diameter of 2.4 cm....
. A cylindrical rod has a length of 30 cm and a diameter of 2.4 cm. One end is kept in a fire at 500◦C while the other is held in cool water kept at 14◦C. What is the rate of heat conduction across the rod?
A long steel bar (20 mm diameter) at 455°C is placed horizontally in a water bath...
A long steel bar (20 mm diameter) at 455°C is placed horizontally in a water bath at 100°C under atmospheric pressure. (a) Estimate the initial heat transfer rate per unit length of the bar to the water when it is initially placed in water. You may assume emissivity of the steel bar to be 1. (b) What type of heat transfer mechanism is present when the bar has cooled to 110°C.
A long steel bar with a diameter of 4 cm (ρ = 7840 kg / m3...
A long steel bar with a diameter of 4 cm (ρ = 7840 kg / m3 , cp = 580 J / kg ° K, k = 52 W / mK, α = 1.21x10-5 m2 / s), internal enters the 2 m long moving belt heat treatment furnace at ambient temperature of 900 ° C at 40 ° C. Since the film coefficient in the oven is 100 W / m2K, the center axis temperature of the bar at the...
A cylindrical piece of steel has a diameter of 50 mm and a length of 200...
A cylindrical piece of steel has a diameter of 50 mm and a length of 200 mm. Steel has a density of 7200 kg/m3 a) (3 points) Determine the mass of this piece in kg. 1. b) (3 points) If a 10 mm diameter opening is drilled through the entire length of this cylinder and that portion removed, what is the new mass of this piece? c) (4 points) The 10 mm diameter piece is pulled with a force of...
A cylindrical piece of steel has a diameter of 50 mm and a length of 200...
A cylindrical piece of steel has a diameter of 50 mm and a length of 200 mm. Steel density of 7200 kg/m^3 Question ) The 10 mm diameter piece is pulled with a force of 500 N. What is the stress in the rod?
A composite rod is made from stainless steel and iron and has a length of 0.535...
A composite rod is made from
stainless steel and iron and has a length of 0.535 m. The cross
section of this composite rod is shown in the drawing below and
consists of a square within a circle.The square cross section of
the steel is 1.27 cm on a side. The temperature at one end of the
rod is 80.6 °C, while it is 19.3 °C at the other end. Assuming that
no heat exits through the cylindrical outer surface,...
A composite rod is made from stainless steel and iron and has a length of 0.498...
A composite rod is made from stainless steel and iron and has a
length of 0.498 m. The cross section of this composite rod is shown
in the drawing below and consists of a square within a circle.
The square cross section of the
steel is 1.14 cm on a side. The temperature at one end of the rod
is 75.9 °C, while it is 17.9 °C at the other end. Assuming that no
heat exits through the cylindrical outer...
Problem 2: A stainless steel rod (k-21 W/m-K, p-8000 kg/m3, C,,-570 J/kg-K) with diameter D-10 mm is heat-treated as it...
Problem 2: A stainless steel rod (k-21 W/m-K, p-8000 kg/m3, C,,-570 J/kg-K) with diameter D-10 mm is heat-treated as it passes through a furnace at a speed of 2 cm/s. The furnace has a convection coefficient of 80 W/m2-K and an air temperature of 900°C. The furnace is 3 m long, and the stainless steel enters at 20°C. (a) Using a control volume of length S traveling with the rod, develop a differential equation for the rate of change of...
1. A steel tube [k 15 W/(m.°C)] of outside diameter 7.6 cm and thickness 1.3 cm...
1. A steel tube [k 15 W/(m.°C)] of outside diameter 7.6 cm and thickness 1.3 cm is covered with an insulation material [k 0.2 W/(m. C)] of thickness 2 cm. A hot gas at 320°C with a heat transfer coefficient of 200 W/(m2.C) flows inside the tube. The outer surface of the insulation is exposed to cooler air at 20°C with a heat transfer coefficient of 50 W/(m2·°C). Calculate a) The heat loss from the tube to the air for...
Оооо оооо оооо оооо т. Steel bar A steel bar, 80 mm in diameter and 200...
Оооо оооо оооо оооо т. Steel bar A steel bar, 80 mm in diameter and 200 mm long, with an emissivity of 0.6, is removed from a furnace at 455ºC and suddenly submerged in a quiescent water 9 bath under atmospheric pressure. Assume evaporation of saturated water at 1 atm to saturated (not D superheated) steam. L Estimate the initial heat transfer rate from the bar, 9, Properties of saturated water at 100°C at 277.5°C P. (kg/m²) = 957.9 P...
A cylindrical piece of steel has a diameter of 50 mm and a length of 200 mm. Steel has a density of 7200 kg/m3 a) (3 points) Determine the mass of this piece in kg. 1. b) (3 points) If a 10 mm diameter opening is drilled through the entire length of this cylinder and that portion removed, what is the new mass of this piece? c) (4 points) The 10 mm diameter piece is pulled with a force of...
A composite rod is made from
stainless steel and iron and has a length of 0.535 m. The cross
section of this composite rod is shown in the drawing below and
consists of a square within a circle.The square cross section of
the steel is 1.27 cm on a side. The temperature at one end of the
rod is 80.6 °C, while it is 19.3 °C at the other end. Assuming that
no heat exits through the cylindrical outer surface,...
A composite rod is made from stainless steel and iron and has a
length of 0.498 m. The cross section of this composite rod is shown
in the drawing below and consists of a square within a circle.
The square cross section of the
steel is 1.14 cm on a side. The temperature at one end of the rod
is 75.9 °C, while it is 17.9 °C at the other end. Assuming that no
heat exits through the cylindrical outer...
Problem 2: A stainless steel rod (k-21 W/m-K, p-8000 kg/m3, C,,-570 J/kg-K) with diameter D-10 mm is heat-treated as it passes through a furnace at a speed of 2 cm/s. The furnace has a convection coefficient of 80 W/m2-K and an air temperature of 900°C. The furnace is 3 m long, and the stainless steel enters at 20°C. (a) Using a control volume of length S traveling with the rod, develop a differential equation for the rate of change of...
1. A steel tube [k 15 W/(m.°C)] of outside diameter 7.6 cm and thickness 1.3 cm is covered with an insulation material [k 0.2 W/(m. C)] of thickness 2 cm. A hot gas at 320°C with a heat transfer coefficient of 200 W/(m2.C) flows inside the tube. The outer surface of the insulation is exposed to cooler air at 20°C with a heat transfer coefficient of 50 W/(m2·°C). Calculate a) The heat loss from the tube to the air for...
Оооо оооо оооо оооо т. Steel bar A steel bar, 80 mm in diameter and 200 mm long, with an emissivity of 0.6, is removed from a furnace at 455ºC and suddenly submerged in a quiescent water 9 bath under atmospheric pressure. Assume evaporation of saturated water at 1 atm to saturated (not D superheated) steam. L Estimate the initial heat transfer rate from the bar, 9, Properties of saturated water at 100°C at 277.5°C P. (kg/m²) = 957.9 P...
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