The surface of a hot plate is made up of 15.0 mm thick aluminum with a...
Homework Answers
Add Answer to:
The
surface of a hot plate is made up of 15.0 mm thick aluminum with a...
Consider a 1000-W iron whose base plate is made of 0.5-cm-thick aluminum alloy 2024-T6 (0-2770 kg/m...
Consider a 1000-W iron whose base plate is made of 0.5-cm-thick aluminum alloy 2024-T6 (0-2770 kg/m and Cp=875 J/kg:"C). The base plate has a surface area of 0.03 m2 Initially, the iron is in thermal equilibrium with the ambient air at 22°C. Assuming 90 percent of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 220°C The minimum time needed for the plate temperature to reach...
Your answer is incorrect. Try again. A square aluminum plate 5 mm thick and 160 mm on a side is h...
Your answer is incorrect. Try again. A square aluminum plate 5 mm thick and 160 mm on a side is heated while vertically suspended in quiescent air at 40°C. Determine the average heat transfer coefficient for the plate when its temperature is 20°C by two methods: (a) using results from the similarity solution to the boundary layer equations, and (b) using results from an empirical correlation. Evaluate properties of air at the film temperature (a) Determine the average heat transfer...
A square aluminum plate 5 mm thick and 150 mm on a side is heated while...
A square aluminum plate 5 mm thick and 150 mm on a side is heated while vertically suspended in quiescent air at 75°C. The temperature of the plate is 15°C a. Write the assumptions of the problem (at least two) b. What are the properities of the problem c. Calculate the Rayleigh number d. What is the nature of the flow e. Calculate the average Nusselt number f. Determine the average heat transfer coefficient for the plate by two methods:...
A hot burrito is placed on a cold plate. The rate at which the burrito cools...
A hot burrito is placed on a cold plate. The rate at which the burrito cools down depends on: a. It's cross sectional area b. The surface area of the plate c. The 4th power it's surface temperature d. The temperature gradient between it's center and the surface of the plate
An aluminum plate with a thickness of L=5 mm is mounted in a horizontal position, and...
An aluminum plate with a thickness of L=5 mm is mounted in a horizontal position, and its bottom surface is well insulated. A special, thin coating (with emissivity and solar absorptivity of 0.25) is applied to the top surface. The density ρ and specific heat c of aluminum are known to be 2700 kg/m3 and 900 J/kg · K, respectively. Consider conditions for which the plate is initially at a temperature of ??????=25 °C and its top surface is suddenly...
finite element method 2. Aluminum fins with rectangular profiles (5 mm wide and 1 mm thick) are used to remove heat...
finite element method
2. Aluminum fins with rectangular profiles (5 mm wide and 1 mm thick) are used to remove heat from a surface whose temperature is 150°C. The temperature of ambient air is 20°C. The thermal conductivity of aluminium is 168 W/m.K. The natural convective coefficient associated with the surrounding air is 35 W/m2.K. The fins are 150 mm long and the heat loss from the tip of the fin may be neglected. (a) Determine the temperature distribution along...
A P=2-kN tensile load is applied to a test coupon made from 1.6-mm thick flat steel...
A P=2-kN tensile load is applied to a test coupon made from
1.6-mm thick flat steel plate (E = 220 GPa, v =
0.30). Assuming a=45 mm and b=13 mm,
(a) Determine the resulting change in the 45-mm gage length.
(b) Determine the resulting change in the 13-mm width.
(c) Determine the resulting change in the 1.6-mm thickness.
(d) Determine the resulting change in the cross-sectional
area.
The uniaxial state of stress in given as ________ (MPa)
A P-2-kN tensile...
13.15 The base plate of an ironi (provided by resistance over a base plate cros plate...
13.15 The base plate of an ironi (provided by resistance over a base plate cros plate of an iron is 0.6 cm thick. The plate is subjected to 100 W of power ded by resistance heaters inside the iron, as shown in Figure P13-15). base plate cross-sectional area of 250 cm, resulting in a uniform flux rated on the inside surface. The thermal conductivity of the metal base generated on th is k = 20 W/m- C. The outside ambient...
Problem 66 2 65 A rectangular fin of type 347 stainless steel is 1 mm thick, 8 mm wide. and 30 mm long. Base temperatur...
Problem 66
2 65 A rectangular fin of type 347 stainless steel is 1 mm thick, 8 mm wide. and 30 mm long. Base temperature is 240°C, and the surrounding air is at 20°C, with hoe ะไ4 W/m" . K. Estimate (a) the tip temperature, (b) the efficiency, and (c) the total heat transfer. 2.66 Repeat Problem 2.65 if the fin is 2024T6 aluminum.
2 65 A rectangular fin of type 347 stainless steel is 1 mm thick, 8 mm...
5) A certain automobile has a 4 mm thick glass window with a surface area of...
5) A certain automobile has a 4 mm thick glass window with a surface area of 2.8 m². The outside temperature is 32°C while the passenger compartment is maintained at 22°C. The convection heat transfer coefficient on the exterior window surface is h = 90 W/(m²K). Determine the heat gain through the windows when the interior convection heat transfer coefficient is h = 15 W/(m²K). By controlling the air flow in the passenger compartment the interior heat transfer coefficient can...
Consider a 1000-W iron whose base plate is made of 0.5-cm-thick aluminum alloy 2024-T6 (0-2770 kg/m and Cp=875 J/kg:"C). The base plate has a surface area of 0.03 m2 Initially, the iron is in thermal equilibrium with the ambient air at 22°C. Assuming 90 percent of the heat generated in the resistance wires is transferred to the plate, determine the minimum time needed for the plate temperature to reach 220°C The minimum time needed for the plate temperature to reach...
Your answer is incorrect. Try again. A square aluminum plate 5 mm thick and 160 mm on a side is heated while vertically suspended in quiescent air at 40°C. Determine the average heat transfer coefficient for the plate when its temperature is 20°C by two methods: (a) using results from the similarity solution to the boundary layer equations, and (b) using results from an empirical correlation. Evaluate properties of air at the film temperature (a) Determine the average heat transfer...
finite element method
2. Aluminum fins with rectangular profiles (5 mm wide and 1 mm thick) are used to remove heat from a surface whose temperature is 150°C. The temperature of ambient air is 20°C. The thermal conductivity of aluminium is 168 W/m.K. The natural convective coefficient associated with the surrounding air is 35 W/m2.K. The fins are 150 mm long and the heat loss from the tip of the fin may be neglected. (a) Determine the temperature distribution along...
A P=2-kN tensile load is applied to a test coupon made from
1.6-mm thick flat steel plate (E = 220 GPa, v =
0.30). Assuming a=45 mm and b=13 mm,
(a) Determine the resulting change in the 45-mm gage length.
(b) Determine the resulting change in the 13-mm width.
(c) Determine the resulting change in the 1.6-mm thickness.
(d) Determine the resulting change in the cross-sectional
area.
The uniaxial state of stress in given as ________ (MPa)
A P-2-kN tensile...
13.15 The base plate of an ironi (provided by resistance over a base plate cros plate of an iron is 0.6 cm thick. The plate is subjected to 100 W of power ded by resistance heaters inside the iron, as shown in Figure P13-15). base plate cross-sectional area of 250 cm, resulting in a uniform flux rated on the inside surface. The thermal conductivity of the metal base generated on th is k = 20 W/m- C. The outside ambient...
Problem 66
2 65 A rectangular fin of type 347 stainless steel is 1 mm thick, 8 mm wide. and 30 mm long. Base temperature is 240°C, and the surrounding air is at 20°C, with hoe ะไ4 W/m" . K. Estimate (a) the tip temperature, (b) the efficiency, and (c) the total heat transfer. 2.66 Repeat Problem 2.65 if the fin is 2024T6 aluminum.
2 65 A rectangular fin of type 347 stainless steel is 1 mm thick, 8 mm...
5) A certain automobile has a 4 mm thick glass window with a surface area of 2.8 m². The outside temperature is 32°C while the passenger compartment is maintained at 22°C. The convection heat transfer coefficient on the exterior window surface is h = 90 W/(m²K). Determine the heat gain through the windows when the interior convection heat transfer coefficient is h = 15 W/(m²K). By controlling the air flow in the passenger compartment the interior heat transfer coefficient can...
Most questions answered within 3 hours.
-
The rise of online shopping and Amazon, in particular, has
created major dilemmas for large food/CPG...
asked 10 minutes ago -
Assuming that the wave speed varies little when sound waves are
traveling through a material that...
asked 10 minutes ago -
Is oxygen difluoride polar or nonpolar?
nonpolar
polar
ionic
none of the above
asked 21 minutes ago -
Starting from rest, a car accelerates at a constant rate of 2.6
m/s2 for a time...
asked 18 minutes ago -
A pharmaceutical company wants to answer the question whether
time for a drug in pill form...
asked 20 minutes ago -
) Assume that in the market for widgets, demand is highly
elastic compared to supply. If...
asked 31 minutes ago -
Why is a personal interview the most important step in the sales
selection process? What are...
asked 41 minutes ago -
In Python rOverlap (x1, y1, w1, h1, x2, y2, w2, h2) A rectangle
is axis-aligned if...
asked 41 minutes ago -
If we observe in a protein solution that DNA is causing a
mixture 260/280 ratio ~0.9,...
asked 51 minutes ago -
Explain the steps involved in making cDNA from mRNA, and how you
would create a cDNA...
asked 52 minutes ago -
A beta (β) particle is described by which of the following?
Select the correct answer below:...
asked 55 minutes ago -
A new machine costs $150,000, lasts 10 years, has an annual
O&M cost of $50,000, and...
asked 58 minutes ago