Determine the heat exchange between the following surfaces with the smaller surface as surface 1 and...
Determine the heat exchange between the following surfaces with the smaller surface as surface 1 and at 1000 K while the larger surface is at 400 K, both surfaces being black. (i) a small square of 0.15 m side and a large parallel plane of 2 m square size with its corner along the center of the small area and 1 m apart. (ii) a small square of 0.15 m side and a large plane of 2 m square kept parallel and center of both along the same line and 1 m apart. (iii) a small circular disk of 0.15 m dia and large disk of 1 m dia at a distance of 1 m with center along the same line and planes parallel to each other. (iv) A small plane of 0.15 m square and a large plane of 2 m square at a distance of 1 m. The small plane is below one corner of the large plane and kept perpendicular to it. (v) A small sphere of 0.1 m dia and a large plane of 1.5 m square, with the sphere kept 1 m below a corner of the large plane
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Determine the heat exchange between the following surfaces with
the smaller surface as surface 1 and...
A small circular surface of area A 2cm located at the center of a 2-m-diameter sphere emits radia...
A small circular surface of area A 2cm located at the center of a 2-m-diameter sphere emits radiation as a blackbody at T 1000 K. Determine the rate at which radiation energy is streaming through a D-1-cm-diameter hole located (a) on top of the sphere directly above Ai and (b) on the side of sphere such that the line that connects the centers of A: and Az makes 45" with surface A
A small circular surface of area A 2cm...
1. A small mass (m = 0.25 kg) is released from rest within and near the...
1. A small mass (m = 0.25 kg) is released from rest within and near the left side of a large spherical shell of material. Which direction will the small mass accelerate? left toward the center right It will not move 2. The same small mass from question #1 is now released from rest 1000 m from the center of a shell of material. The shell has a radius of 500 m and a mass of 10000 kg. A second...
Problem 1 (20 marks): A 1-m x 1-m surface at 100 °C is to be cooled...
Problem 1 (20 marks): A 1-m x 1-m surface at 100 °C is to be cooled by attaching to it 5-cm long, 0.25- cm-thick square aluminum fins (k = 237 W/m- K), with an edge-to-edge distance between the fins of 0.25 cm. The temperature of the fin tip is the same as surrounding medium at 30°C, und the heat transfer coefficient on the surfaces is 35 W/m2 K. Determine: temperature at distance of 2 cm away from the base the...
A plastic disk initially rotates freely and without friction on an icy surface, as shown in...
A plastic disk initially rotates freely and without friction on an icy surface, as shown in the figure. The disk completes 1.0 revolution every 0.75 seconds., The disk has a radius 0.035 m, a thickness o 0,0070 m, and a mass of 0.15 k seolution esery eled Bool Square face is 0.060 m by 0.060 m. 0.012 m rotating plastic icy surface (a) Calculate the initial angular velocity of the plastic disk in units of radians per second. (b) Calculate...
i need help on number3 lelmperaturein the luid as a function of r, the distance from...
i need help on number3
lelmperaturein the luid as a function of r, the distance from the descne t re? What are the boundary conditions? The thermal conductivity k of the fluid is considered center of the sphe constant. The temperature of the sphere constant at Ta boundary is constant at Tr. and the temperature far from the fluid is (b) Determine the temperature profile in the fluid. (c) From the temperature profile, obtain an expression for the heat flux...
8. Consider two square parallel vertical Plate 2 (on the right) is insulated and its tem...
8. Consider two square parallel vertical Plate 2 (on the right) is insulated and its tem are surrounded by its temperature is T. = 300 K. parallel vertical plates of 1 m side. Plate 1 (on the left) is kept at T. - 700 K and is insulated and its temperature is T2 = 300 K. The plates are placed 0.5 m apart and 3) with walls at Tw=270 K. The air in the room is stagnant and a. Find...
Force between an Infinitely Long Wire and a Square Loop
A square loop of wire with side length a carries a current I1. The center of the loop is located a distance d from an infinite wire carrying a current I2. The infinite wire and loop are in the same plane; two sides of the square loop are parallel to the wire and two are perpendicular as shown. (Figure 1)Part AWhat is the magnitude, F, of the net force on the loop?Express the force in terms of I1, I2, a,...
heat transfer Consider the picture shown below. The very long cylindrical rod (surface 1) acts as...
heat transfer
Consider the picture shown below. The very long cylindrical rod (surface 1) acts as a black surface 1 m in diameter which is maintained at 1000 K. The rod is surrounded by a very thin cylindrical shield with inner surface 3-1 and outer surface 3-2. The diameter of this shield is 2 m; and is so thin that the inner and outer surface areas are essentially the same. The shield has an emissivity of 0.3 on both sides....
1. A triangle having a base of 1.8 meters and altitude of 2.5 meters wholly immersed in water, it...
1. A triangle having a base of 1.8 meters and altitude of 2.5 meters wholly immersed in water, its base being in the surface and its plane vertical. If the triangle will be divided by a horizontal line through its center of pressure. (35 points) a. Find the location of the center of pressure of the triangle (whole section b. Find the pressure at the triangle (the whole) c. Find the pressure on the upper area of the triangle d....
Select Tru or False. 1. A conducting sphere with charge Q at equilibrium has zero E...
Select Tru or False. 1. A conducting sphere with charge Q at equilibrium has zero E field inside it. The E field outside is the same as that of a point charge Q, E=keQ/r2. The potential outside it is the same as that of a point charge Q. V= keQ/r. (r is the distance to the center). The potential inside the conducting sphere is equal to the potential at its surface. V= keQ/R. (R is the radius of the sphere)...
A small circular surface of area A 2cm located at the center of a 2-m-diameter sphere emits radiation as a blackbody at T 1000 K. Determine the rate at which radiation energy is streaming through a D-1-cm-diameter hole located (a) on top of the sphere directly above Ai and (b) on the side of sphere such that the line that connects the centers of A: and Az makes 45" with surface A
A small circular surface of area A 2cm...
Problem 1 (20 marks): A 1-m x 1-m surface at 100 °C is to be cooled by attaching to it 5-cm long, 0.25- cm-thick square aluminum fins (k = 237 W/m- K), with an edge-to-edge distance between the fins of 0.25 cm. The temperature of the fin tip is the same as surrounding medium at 30°C, und the heat transfer coefficient on the surfaces is 35 W/m2 K. Determine: temperature at distance of 2 cm away from the base the...
A plastic disk initially rotates freely and without friction on an icy surface, as shown in the figure. The disk completes 1.0 revolution every 0.75 seconds., The disk has a radius 0.035 m, a thickness o 0,0070 m, and a mass of 0.15 k seolution esery eled Bool Square face is 0.060 m by 0.060 m. 0.012 m rotating plastic icy surface (a) Calculate the initial angular velocity of the plastic disk in units of radians per second. (b) Calculate...
i need help on number3
lelmperaturein the luid as a function of r, the distance from the descne t re? What are the boundary conditions? The thermal conductivity k of the fluid is considered center of the sphe constant. The temperature of the sphere constant at Ta boundary is constant at Tr. and the temperature far from the fluid is (b) Determine the temperature profile in the fluid. (c) From the temperature profile, obtain an expression for the heat flux...
8. Consider two square parallel vertical Plate 2 (on the right) is insulated and its tem are surrounded by its temperature is T. = 300 K. parallel vertical plates of 1 m side. Plate 1 (on the left) is kept at T. - 700 K and is insulated and its temperature is T2 = 300 K. The plates are placed 0.5 m apart and 3) with walls at Tw=270 K. The air in the room is stagnant and a. Find...
heat transfer
Consider the picture shown below. The very long cylindrical rod (surface 1) acts as a black surface 1 m in diameter which is maintained at 1000 K. The rod is surrounded by a very thin cylindrical shield with inner surface 3-1 and outer surface 3-2. The diameter of this shield is 2 m; and is so thin that the inner and outer surface areas are essentially the same. The shield has an emissivity of 0.3 on both sides....
1. A triangle having a base of 1.8 meters and altitude of 2.5 meters wholly immersed in water, its base being in the surface and its plane vertical. If the triangle will be divided by a horizontal line through its center of pressure. (35 points) a. Find the location of the center of pressure of the triangle (whole section b. Find the pressure at the triangle (the whole) c. Find the pressure on the upper area of the triangle d....
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