Question

An aluminum plate 10 × 10 × 1 cm thick separates a heat source at 300oC...

An aluminum plate 10 × 10 × 1 cm thick separates a heat source at 300oC from a bath containing 1 liter of water at 25C. Calculate (a) the heat transferred to the water each second and (b) the time required to warm the water to 26C. The thermal conductivity of Al is 238 W/m⋅K over this temperature range.

Engineering   Electrical-Engineering   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1

Answer:- a) The expression for the rate of heat transfer is-

Here length is the thickness i.e. 1 cm = 0.01 m. Keeping all the values, we get-

Answer:- b) To raise the water temperature by 1 0C, we need 4182 Joule of energy. So the time needed is-

0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
71 mm thick horizontal plate made of an opaque material of thermal conductivity k= 25 W/m-K....
71 mm thick horizontal plate made of an opaque material of thermal conductivity k= 25 W/m-K. At the bottom, water flows at a temperature of T∞,w = 25C, whereas air flows at the top of the plate at T∞,a = 710 C having convection coefficient of ha= 71 W/m2-K. Assuming a diffused top of the plate that receives an irradiated flux of 7100W/m2, of which 30% is reflected back. The top and bottom surface temperatures are maintained at 43 C...
Q. Unsteady conduction A large steel plate 0.02 m thick leaves a heat treating furnace at...
Q. Unsteady conduction A large steel plate 0.02 m thick leaves a heat treating furnace at 425 oC. And the plate is plunged into water (at 25 oC) and cooled from both sides. How long does it take for the maximum temperature to reach 65 oC? For steel plate: thermal conductivity, k=30 W/m·K, density ?=7600 kg/m3, heat capacity cp=700 J/kg·K. Heat transfer coefficients: h=6000 W/m2·K in water. Please use two methods to calculate this question: (1) Directly apply the exact...
consider a 0.8 cm thick steel plate with a thermal conductivity of 50W/m-k.When the inside surface...
consider a 0.8 cm thick steel plate with a thermal conductivity of 50W/m-k.When the inside surface of the plate is subjected to a uniform heat flux 0f 5*104 w/m2 the oter surface temperature of the plate is measured to be 110c under steady operating condition a)express the differential equation and the boundary conditions for steady one dimensional heat conduction through the wall b)obtain the relation for the variation of temperature in the plate by solving the differential equation. c)evaluate the...
A carpenter builds an exterior house wall with a layer of wood 3.0 cm thick on...
A carpenter builds an exterior house wall with a layer of wood 3.0 cm thick on the outside and a layer of Styrofoam insulation 2.2 cm thick on the inside wall surface. The wood has a thermal conductivity of 0.080 W/(m⋅K), and the Styrofoam has a thermal conductivity of 0.010 W/(m⋅K). The interior surface temperature is 16.0 ∘C, and the exterior surface temperature is -11.0 ∘C. Part A What is the temperature at the plane where the wood meets the...
A clever student decides to produce and sell windows that consist of two 5.9-mm thick glass...
A clever student decides to produce and sell windows that consist of two 5.9-mm thick glass panes ( thermal conductivity of 1 W/m-K) separated by a 0.9-cm thick layer of aerogel, which has a thermal conductivity of 10-4 W/m-K). Assuming the temperature inside is 19.5˚ C, and the temperature outside is -4.7˚C, what is the approximate heat loss in units of Watts through such a window with area 1 m2?
An ice chest is constructed of a 0.4 mm thick plain-carbon steel plate, a 1.9 cm...
An ice chest is constructed of a 0.4 mm thick plain-carbon steel plate, a 1.9 cm thick layer of Styrofoam {k=0.033 W/(m-C)} and a 0.65 cm thick fiber glass liner. The cooler has inside dimensions of 25x40x100 cm. The outside of the chest is exposed to air at 25 ?C with h = 10 W/(m2C). If the chest is completely filled with ice, calculate the time for the ice to completely melt. The heat of fusion for water is 330...
A lake is covered with ice that is 3.6 cm thick. The temperature of the ambient...
A lake is covered with ice that is 3.6 cm thick. The temperature of the ambient air is –15°C. Find the rate of thickening of ice. Assume the thermal conductivity of ice is 2.00 W/(m · K), the density of ice is 9.0 ✕ 102 kg/m3, and the latent heat of fusion is 3.33 ✕ 105 J/kg. µm/s?
1. [20] A small building that shelters a water supply pump measures 2 m ×3 m...
1. [20] A small building that shelters a water supply pump measures 2 m ×3 m ×2.4 m high. It is constructed of 1-cm thick wood having a thermal conductivity of 0.126 W∙m-1 ∙K -1 . The inside walls are to be maintained at 10 oC when the outside temperature is -18 oC. How much heat must be supplied to maintain the desired temperature? How much heat must be supplied if the walls are lined with 10 cm of glass-wool...
A large block of ice is sitting on a thick copper slab. The bottom surface of...
A large block of ice is sitting on a thick copper slab. The bottom surface of the slab is maintained at a temperature of 60.0°C. The upper surface, completely in contact with the ice, is at the temperature of the ice, which is 0°C. The slab is 3.90 cm thick, and has an area of 80.0 cm2. Note that copper has a thermal conductivity of 401 W/(mK), aluminum has a thermal conductivity of 237 W/(mK), and the latent heat of...
A 1.9-cm-thick wood floor covers a 4.0m×5.5m room. The subfloor on which the flooring sits is...
A 1.9-cm-thick wood floor covers a 4.0m×5.5m room. The subfloor on which the flooring sits is at a temperature of 16.1 ∘C, while the air in the room is at 19.2 ∘C. What is the rate of heat conduction through the floor? Use 0.200 W/m⋅K for the thermal conductivity of wood.
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT