An electric kitchen range has a total wall area of 1.40 m2and is insulated with a layer of fiberglass 4.00 cm thick. The insidesurface of the fiberglass has a temperature of 175°C, and its outsidesurface is at 35.0°C. The fiberglass has a thermal conductivity of0.040 W /m . K. (a) What is the heat current through the insulation,assuming it may be treated as a flat slab with an area of 1.40 m2?(b) What electric-power input to the heating element is required tomaintain this temperature?

An electric kitchen range has a total wall area of 1.40 m2and is insulated with a layer of fiberglass 4.00 cm thick. The insidesurface of the fiberglass has a temperature of 175°C, and its outsidesurface is at 35.0°C. The fiberglass has a thermal conductivity of0.040 W /m . K. (a) What is the heat current through the insulation,assuming it may be treated as a flat slab with an area of 1.40 m2?(b) What electric-power input to the heating element is required tomaintain this temperature?

Related questions

Q: The filament of a 75-W light bulb is at a temperature of 3300 K. Assuming the filament has an…

A: Write the equation to calculate the power radiated by the bulb

Q: A naked person whose body has a surface area of 1.40 m2 with an emissivity of 0.85 has a skin…

A: Given, Surface Area, A = 1.40 m2 Emissivity, e = 0.85 Skin temperature, T = 37°C = 310 K Room…

Q: body whose surface area is 0.2 m2, emissivity is 0.8, and temperature is 100°C is placed in a large,…

Q: (A) Loose electrons move quickly away from hot locations, making it impossible for energy to move…

A: Introduction : Loose electrons are the outer electrons which are held loosely in the atom.

Q: In order not to damage the resistance in the kettles, the difference between the temperature of the…

Q: Suppose a person is covered head to foot by wool clothing with an average thickness of d = 1.95 cm…

Q: Consider a 1 m² section of gypsum board, that is 2 cm thick, and that has a thermal conductivity of…

A: Absolute thermal resistance

Q: The operating temperature of a tungsten filament in an incandescent light bulb is 2500 KK, and its…

Q: What is the power (in W) of the heater.

Q: Thermography is a technique for measuring radiant heat and detecting variations in surface…

A: Step 1:Recall that the rate of heat transfer emitted by a surface is defined as…

Q: water heater is operated by solar power. If solar collector has an area of 6.00m2 , and the…

A: Volume of water = 1m3Density of water p = 1000 kg/m3Area of solar collector = 6m2Intensity by…

Q: There is a window whose dimensions are 1 m by 3 m, and is 10 cm thick. Its separates the inside of…

A: Given Area of window, A = 3 m2 Thickness of window, L = 10 cm Inside temperature, T1 = 25 degree…

Q: A length of copper wire is connected to a constant voltage source and a current of 0.4 A is…

Q: How much heat transfer is required to raise the temperature of a 800 g aluminum pot containing 2000…

A: Given data: Mass of aluminum (mAl) = 800 g Mass of water (mw) = 2000 g Initial temperature of the…

Q: An object has an emissivity of 0.725. At temperature T, it radiates heat at a rate of 10.W. What is…

Q: A family comes home from a long vacation with laundry to do and showers to take. The water heater…

Q: The tungsten filament of a certain 100 W lightbulb radiates 2.00 W of light (electro- magnetic…

Q: A heavily insulated copper rod or diameter 2 cm and length 25 cm is used to pipe heat between two…

A: The rate of heat transfer is given by H = K A (T ' - T)L where, K is the coefficient of thermal…

Q: A student is trying to decide what to wear. His bedroom is at 20°C. His skin temperature is 35°C.…

A: Sigma( σ ) = Stefan Boltzmann constant =5.67×10^-8 W/m^2.K^2

Q: The tungsten filament of a light bulb has an operating temperature of about 2100 K. If the emitting…

Q: Two different materials (A and B) are being considered as insulation for a winter coat. Material A…

A: Heat conduction.

Q: A family comes home from a long vacation with laundry to do and showers to take. The water heater…

Q: (a) A 1.8 cm thick wooden floor covers a 4.0 m × 5.5 m room. The subfloor is at a temperature of…

A: (a) Given : Thickness of a wooden floor (L) = 1.8 cm = 0.018 m Area of room = 4.0 × 5.5 = 22 m2…

Q: The next four questions use this description. Our Sun has a peak emission wavelength of about 500 nm…

A: Given:- The wavelength λ = 500 nm The radius r = 7 x 105 km The dark-adapted eye has a pupil…

Question

An electric kitchen range has a total wall area of 1.40 m2
and is insulated with a layer of fiberglass 4.00 cm thick. The inside
surface of the fiberglass has a temperature of 175°C, and its outside
surface is at 35.0°C. The fiberglass has a thermal conductivity of
0.040 W /m . K. (a) What is the heat current through the insulation,
assuming it may be treated as a flat slab with an area of 1.40 m2?
(b) What electric-power input to the heating element is required to
maintain this temperature?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

pls need asap
A heavily insulated copper rod or diameter 2 cm and length 25 cm is used to pipe heat between two objects. If the rate of heat transfer is 100 W and the hot object has a temperature of 50oC, what is the temperature of the cold object in oC?
Presents the diagram of the problem, necessary formulas, clearance and numerical solution: The filament of an incandescent lamp has an area of 50 mm2 and operates at a temperature of 2,127 ◦C. Assume that all the energy supplied to the bulb is radiated by it. If the emissivity of the filament is 0.83, how much power must be supplied to the bulb when it is in operation?
The next four questions use this description. Our Sun has a peak emission wavelength of about 500 nm and a radius of about 700,000 km. Your dark-adapted eye has a pupil diameter of about 7 mm and can detect light intensity down to about 1.5 x 10-11 W/m2. Assume the emissivity of the Sun is equal to 1. First, given these numbers, what is the surface temperature of the Sun in Kelvin to 3 significant digits? What is the power output of the Sun in moles of watts? (in other words, take the number of watts and divide it by Avogadro's number) Assuming that all of the Sun's power is given off as 500 nm photons*, how many photons are given off by the Sun every second? Report your answer to the nearest power of 10 (e.g. if you got 7 x 1024, give your answer as 25).
A student is trying to decide what to wear. His bedroom is at 20°C. His skin temperature is 35°C. The area of his exposed skin is 1.50 m². People of all races have skin that is dark in the infrared, with emissivity about 0.900. Find the net energy loss from his body by radiation in 10.0 min.
Radioactive decay of elements in the earth’s interior results in a mean heat flux through the Earth’s surfaceof 5×10−2Wm−2. What is the flux expressed as a fraction of the energy flux due to thermal re-radiation of absorbed solar energy? If radioactive decay were the only heat source for the Earth, what would the Earth’s temperature be?
A light bulb filament is constructed from 2 cm of tungsten wire of diameter 50 pam and is enclosed in an evacuated glass bulb. What temperature does the filament reach when it is operated at a power of 1 W? (Assume the emissivity of the tungsten surface to be 0.4.)