a block of copper that has the dimesnsions if L x W x H= 21.00 x...
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Thin strips of brass and copper of equal length are used to construct a bimetallic strip....
Thin strips of brass and copper of equal length are used to construct a bimetallic strip. When the strip is heated, due to the difference in the coefficient of linear expansion of the two metals, the brass strip will have a greater increase in length than the copper strip, causing them to bend into an arc with the brass on the outside of the curve. When the temperature of s by 25.8 C, the angle subtended by the two ends...
(a) of the diameter of a copper sphere is 2.540 cm at 20.00'C, what will its...
(a) of the diameter of a copper sphere is 2.540 cm at 20.00'C, what will its diameter be at a temperature of 108.0"C? The coefficient of linear expansion of copper is 17 x 10-rc. (Give your answer to at least three decimal places) 2.540 X Consider linear expansion along the radial directionem (6) For the volume of the sphere to increase by 1.120, to what temperature should the sphere be heated The content of volume expansion is 3 times that...
Consider the following. (a) A rectangular block has the dimensions { x W x h. When...
Consider the following. (a) A rectangular block has the dimensions { x W x h. When a battery with a voltage AV is connected across the end faces as shown in the left figure above, a current 1; flows through the circuit. If the same battery is connected across the top and bottom faces of the block as shown in t right figure, what is the current 1, that flows through the circuit? Give your answer in terms of I.....
A sheet of glass has height H=100 cm and width W=150 cm at 5.0 °C. The...
A sheet of glass has height H=100 cm and width W=150 cm at 5.0 °C. The coefficient of linear thermal expansion of glass is 9.00x10-6/°C. (a) What is the area of the glass sheet at 5.0 °C, in m2? (b) What is the area of the glass sheet at 35.0 °C, in m2? Keep 6 sig figs. (c) What is the % increase in the area of the glass sheet due to thermal expansion?
1. Molten copper flows through a l m long alumina pipe that has an ID of...
1. Molten copper flows through a l m long alumina pipe that has an ID of 25 cm and a wall thickness of 5 cm. The molten copper has a temperature of 1,500 °C and the alumina pipe is surrounded by 25 °C air. The thermal conductivity of alumina is 46 W/m °C. The convection heat transfer coefficients are 500 W/m2 °C between the alumina pipe and ambient air and 200 W/m² °C between molten copper and the alumina pipe....
A block of weight w sits on a plane inclined at an angle θ as shown....
A block of weight w sits on a plane inclined at an angle θ as
shown. (Figure 1) The coefficient of kinetic friction between the
plane and the block is μ.
A force F⃗ F→F_vec is applied to push the block up the incline
at constant speed.
Part D
What is the change in potential energy of the block, ΔUΔUDeltaU,
as it moves a distance LLL down the incline?
Express your answer in terms of some or all of the...
A 15.0 g copper ring at 0°C has an inner diameter of D = 3.61231 cm....
A 15.0 g copper ring at 0°C has an inner diameter of D = 3.61231 cm. A hollow aluminum sphere at 93.0°C has a diameter of d 3.61852 cm. The sphere is placed on top of the ring (see the figure), and the two are allowed to come to thermal equilibrium, with no heat lost to the surroundings. The sphere just passes through the ring at the equilibrium temperature. What is the mass of the sphere? The linear expansion coefficient...
Lecture Assignment #7 A heat sink is composed of an array of rectangular fins. h-63 W/m-K...
Lecture Assignment #7 A heat sink is composed of an array of rectangular fins. h-63 W/m-K T 35°C a=2 mm b-2 mm FL-14 mm W-24 cm th, 0.75 cm k-35 W/m-K p 8200 kg/m The heat sink is square with base side dimension W 24 cm and base thickness ths- 0.75 cm. The fins are square and have side dimension a 2 mm and length L 14 mm. Fins are separated by a distance b 2 mm. (Note that there...
A solid block of plastic has the following dimensions and properties at 20.0 oC: • L...
A solid block of plastic has the following dimensions and properties at 20.0 oC: • L = 42.11 cm, W = 37.55 cm, and H = 19.36 cm; • ρ = 917 kg/m3 A. Calculate the volume and mass of the plastic at 20.0 oC. B. The block is placed in a fresh water lake. Determine if the block floats. If the block sinks to the bottom, calculate the force the bottom of the lake exerts on the block. If...
Part 2 - Problems (75 marks) I. Copper fins (k 401 W/mK) of uniform square cross-section...
Part 2 - Problems (75 marks) I. Copper fins (k 401 W/mK) of uniform square cross-section (2mm x 2mm) and length L 30mm are used in a fin array to enhance heat transfer from a 40mm x 40mm surface that is maintained at Tb 170°C. There are a total of 100 fins, and the tip of the fins is maintained at 35°C. Air circulates over the fin array with a temperature of To = 15°C and a convection coefficient of...
Thin strips of brass and copper of equal length are used to construct a bimetallic strip. When the strip is heated, due to the difference in the coefficient of linear expansion of the two metals, the brass strip will have a greater increase in length than the copper strip, causing them to bend into an arc with the brass on the outside of the curve. When the temperature of s by 25.8 C, the angle subtended by the two ends...
(a) of the diameter of a copper sphere is 2.540 cm at 20.00'C, what will its diameter be at a temperature of 108.0"C? The coefficient of linear expansion of copper is 17 x 10-rc. (Give your answer to at least three decimal places) 2.540 X Consider linear expansion along the radial directionem (6) For the volume of the sphere to increase by 1.120, to what temperature should the sphere be heated The content of volume expansion is 3 times that...
Consider the following. (a) A rectangular block has the dimensions { x W x h. When a battery with a voltage AV is connected across the end faces as shown in the left figure above, a current 1; flows through the circuit. If the same battery is connected across the top and bottom faces of the block as shown in t right figure, what is the current 1, that flows through the circuit? Give your answer in terms of I.....
A sheet of glass has height H=100 cm and width W=150 cm at 5.0 °C. The coefficient of linear thermal expansion of glass is 9.00x10-6/°C. (a) What is the area of the glass sheet at 5.0 °C, in m2? (b) What is the area of the glass sheet at 35.0 °C, in m2? Keep 6 sig figs. (c) What is the % increase in the area of the glass sheet due to thermal expansion?
1. Molten copper flows through a l m long alumina pipe that has an ID of 25 cm and a wall thickness of 5 cm. The molten copper has a temperature of 1,500 °C and the alumina pipe is surrounded by 25 °C air. The thermal conductivity of alumina is 46 W/m °C. The convection heat transfer coefficients are 500 W/m2 °C between the alumina pipe and ambient air and 200 W/m² °C between molten copper and the alumina pipe....
A block of weight w sits on a plane inclined at an angle θ as
shown. (Figure 1) The coefficient of kinetic friction between the
plane and the block is μ.
A force F⃗ F→F_vec is applied to push the block up the incline
at constant speed.
Part D
What is the change in potential energy of the block, ΔUΔUDeltaU,
as it moves a distance LLL down the incline?
Express your answer in terms of some or all of the...
A 15.0 g copper ring at 0°C has an inner diameter of D = 3.61231 cm. A hollow aluminum sphere at 93.0°C has a diameter of d 3.61852 cm. The sphere is placed on top of the ring (see the figure), and the two are allowed to come to thermal equilibrium, with no heat lost to the surroundings. The sphere just passes through the ring at the equilibrium temperature. What is the mass of the sphere? The linear expansion coefficient...
Lecture Assignment #7 A heat sink is composed of an array of rectangular fins. h-63 W/m-K T 35°C a=2 mm b-2 mm FL-14 mm W-24 cm th, 0.75 cm k-35 W/m-K p 8200 kg/m The heat sink is square with base side dimension W 24 cm and base thickness ths- 0.75 cm. The fins are square and have side dimension a 2 mm and length L 14 mm. Fins are separated by a distance b 2 mm. (Note that there...
Part 2 - Problems (75 marks) I. Copper fins (k 401 W/mK) of uniform square cross-section (2mm x 2mm) and length L 30mm are used in a fin array to enhance heat transfer from a 40mm x 40mm surface that is maintained at Tb 170°C. There are a total of 100 fins, and the tip of the fins is maintained at 35°C. Air circulates over the fin array with a temperature of To = 15°C and a convection coefficient of...
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