A house has walls made out of steel with the following properties:Thickness300mmDensitykg/m3 7800ThermalConductivityw/m-K50Specific HeatCapacityEmbodiedJ/kg-K 500MJ/kg26EnergyCost$/kg 0.70The time that it will take, in hours, for the interior temperature to start changingafter the exterior is exposed to a sudden temperature is:

Given, density , ρ = 7800 Kg/m3 thickness , x = 300mm thermal conductivity , k =50 W/m-k…

A house has walls made out of steel with the following properties: Thickness Density Thermal Conductivity Specific Heat mm 300 kg/m3 7800 w/m-K 50 J/kg-K 500 Сарacity Embodied MJ/kg 26 Energy Cost $/kg 0.70 The time that it will take, in hours, for the interior temperature to start changing after the exterior is exposed to a sudden temperature is:

A house has walls made out of steel with the following properties: Thickness Density Thermal Conductivity Specific Heat mm 300 kg/m3 7800 w/m-K 50 J/kg-K 500 Сарacity Embodied MJ/kg 26 Energy Cost $/kg 0.70 The time that it will take, in hours, for the interior temperature to start changing after the exterior is exposed to a sudden temperature is:

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

Jes 1:01 i docs.google.com/forms what is the Physicists recognize four fundamental forces.* Flectrical force O - Gravitational force -Strong nuclear force Weak nuclear force O -Muscular force Force of friction Ff is described by • Ff = µN * O p synovlal fluld in the Joints P -coefficient of fraction between two surface in The temperature of the human body is normally about 98.6°F.calculate the temperature of the body "C* oC = (5/9)x(oF-32) =5/9(98.6- 32)-37 oc oc=(9/5)x(of -32) =9/5(98,6-32) =13,3 Under resting conditions the body energy is being used as follows * O 27% by the liver and splee O 20-%by the skeletal musules Under resting conditions the body energy is being used as follows. O 19% by the brain. 15% by the kidney. We can write the first law of thermodynamics as: * O AU-AQ -A.. O AU-AQ +AW. 1kcal = J O 1 Kcal =4184j. O O O O
A house, for cooling purposes, consists of two zones: the attic area zone A and the living area zone B (see below figure). The living area is cooled by a 2-ton air conditioning unit that removes 19 °F per thousand Btu. The time constant for heat 4 41,000 Btu/hr. The heat capacity of zone B is transfer between zone A and the outside is 2 hr, between zone B and the outside is 4 hr, and between the two zones is 4 hr. If the outside temperature stays at 90°F, how warm does it eventually get in the attic zone A? It eventually gets to be F in the attic zone A. (Type an integer or decimal rounded to the nearest hundredth as needed.) 4 hr Î A 쉽 4 hr B 2 hr 41,000 Btu/hr
A temperature difference of 85 •C is impressed across a fiberglass layer of 13 cm thickness. The thermal conductivity of the fiberglass is 0.035 W/m • -C. Compute the heat transferred through the material in kcal per hour per unit square meter area.
R Value: Wall: 0.961m2k/w Floor: 0.676m2k/w Roof: 0.7465m2k/w In a table format show with calculations and research how much money you can save by installing a 115mm layer of insulation (R2.9) in your walls, floor and ceiling over a 5 and 10 year period. Consider the capital costs. Hint: State the current R value of each component. Convert to U value. Calculate new R value of each component (walls, floor and ceiling). Convert to U value. Use Q(W)=A*(change in U)*temperature change. Determine price for installation of new insulation. Determine price saved based on less heat loss through each component separately, then add all values together, and calculate per 5 years and per 10 years. Present all of this information in a table. You do not need to draw any diagrams, simply add the R value in series with your current components R values. Assume the energy cost is 25 cents kWh
Unit of thermal conductivity in S.I. units is(A) J/m² sec(B) J/m °K sec(C) W/m °K(D) Option B and C above.
5) Materials A and D are rigid while materials B and C have thermal expansion coefficients of 150 E-6/°C and 55 E-6/°C respectively. Dimensions are 50 mm x 50 mm x 600 mm for material B and 75 mm x 75 mm x 250 mm for material C. If B and C are apart by 1.5 cm at temperature of 20°C, calculate the lowest temperature that closes the distance between B and C. 1.5 cm A 600 mm 250 mm
Hello, pleae answer this, Thank you. Much appreciated
The heat capacity of a liquid is 250 J/K, if its mass is 50 kg the specific heat capacity of the liquid would be 1250 J kg/ K C° 50 J kg/ K C° 125 J kg/ K C° 5 J kg/ K C° No answer
When the sun is high in the sky, it delivers approximately 1000 watts of power to each square meter of earth's surface. The temperature of the surface of the sun is about 6000 K, while that of the earth is about 300 K. Suppose you plant grass on this square meter of earth. Some people might argue that the growth of the grass (or of any other living thing) violates the second law of thermodynamics, because disorderly nutrients are converted into an orderly life form. How would you respond?
1 hr A house, for cooling purposes, consists of two zones: the attic area zone A and the living area zone B (see below figure). The living area is cooled by a 2-ton air conditioning unit A that removes 43,000 Btu/hr. The heat capacity of zone B is °F per thousand Btu. The 43,000 Btu/hr time constant for heat transfer between zone A and the outside is 1 hr, between zone B and the outside is 2 hr, and between the two zones is 2 hr. If the outside temperature stays at 110°F, how warm does it eventually get in the attic zone A? 2 hr 2 hr B It eventually gets to be °F in the attic zone A. (Type an integer or decimal rounded to the nearest hundredth as needed.)
A person informs an engineer that he frequently feels cooler in the summer when standing in front of an open refrigerator. The engineer tells him that he is only “imagining things” because there is no fan in the refrigerator to blow the cool air over him. A lively argument ensues. Whose side of the argument do you take? Why?
Please help me fast.