Hi, can you help me to answer this question using the first law of thermodynamics formula to explain this event? On a hot summer day, a student turns his fan on when he leaves his room in themorning. When he returns in the evening will the room be warmer or cooler than theneighborouing rooms ? Explain your answer using the first law of thermodynamics.Assume ALL doors and windows are kept closed.

Hi, can you help me to answer this question using the first law of thermodynamics formula to explain this event? On a hot summer day, a student turns his fan on when he leaves his room in themorning. When he returns in the evening will the room be warmer or cooler than theneighborouing rooms ? Explain your answer using the first law of thermodynamics.Assume ALL doors and windows are kept closed.

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter8: Natural Convection

Section: Chapter Questions

Problem 8.12P: 8.12 An electric room heater has been designed in the shape of a vertical cylinder 2 m tall and 30...

See similar textbooks

Similar questions

8.12 An electric room heater has been designed in the shape of a vertical cylinder 2 m tall and 30 cm in diameter. For safety, the heater surface cannot exceed . If the room air is at , find the power rating of the heater in watts.
Answer step by step. Subject: thermodynamics and Heat Transfer
In thermodynamics, how do you differentiate a closed system with an adiabatic system? What is the difference in the equation used for calculating heat transfer? (If you know a good book or scientific article that contains info regarding this, please include. Thank you.)
Does the Rankine degree represent a larger or smaller temperature unit than the Kevin degree? Explain.
The interior contents and materials of a small building weigh 10 tons, and together they have an average specific heat of 0.25 Btu/ (lbm - °F). Neglecting any inefficiency in the furnace, what amount of natural gas must be burned to raise the building's temperature from freezing to 80° F? (Express your answer using three significant figures.) mgan = Ibm
Hi, can you help me to answer this question using the first law of thermodynamics? On a hot summer day a student turns his fan on when he leaves his room in themorning. When he returns in the evening will the room be warmer or cooler than theneighborouing rooms ? Explain your answer using the first law of thermodynamics.Assume ALL doors and windows are kept closed.
If I am given two thermodynamic properties of a material as equations with some units that are unknown, how can I use thermodynamic principles to determine what those units are? The properties given are pressure and internal energy.
6. a. The heat flux applied to the walls of the biomass combustion furnace is 20 W/m2. The furnace walls have a thickness of 10 mm and a thermal conductivity of 12 W/m.K. If the wall surface temperature is measured to be 50oC on the left and 30oC on the right, prove that conduction heat transfer occurs at a steady state!b. Heating the iron cylinder on the bottom side is done by placing the iron on the hotplate. This iron has a length of 20 cm. The surface temperature of the hotplate is set at 300oC while the top side of the iron is in contact with the still outside air. To reach the desired hotplate temperature, it takes 5 minutes. Then it takes 15 minutes to measure the temperature of the upper side of the iron cylinder at 300oC. Show 3 proofs that heat transfer occurs transiently
-A per fectly sealed room metors height 10 meters wide, 12 meter? long and 3 Is composed of 49 shudonts and I pro fessor- The piesore and temperature of I atm and o deg C. respechiuely. If a person occopics an averange room has an initial Volume of D-20 ecubic meter and gjuel off 678 kj per nour of heat, what woud be the temperatore of the room af ter 10 mins ! Usc moleculor mass of air M equal to 28.9 kg/mol, specific heat of cir af constant volume Cv cqual to 0.718b HT/kq-k Cand gav constant R eaual to 0.117 k5/kg-u
Direction: Read and analyze the question. Write your answers in a separate paper. I. Figure A. the objects A and B are inside a closed system (isolated with the outside environment) wherein they are separated with adiabatic wall (no flow of energy). Figure B. is separated with diathermic wall (permits the flow of energy). (a) Question: (b) 1. Explain how the Zeroth law of thermodynamics in the figure A and B.
Air at 27 Celsius degree receives heat at a constant volume until its temperature reaches 927 Celsuis degree. determine the heat added per kelogram?
A family enters a winter vacation cabin has been unheated for such a long time the interior temperature is the same as the outside temperature (00C). The cabin consists of a single room of floor area 4m by 4m and height 3m. The room contains one 2kW electric heater. Assuming that the room is perfectly airtight and that all the heat from the electric heater is absorbed by the air, none escaping through the walls or being absorbed by the furnishing, how long after the heater is turned on will the temperature reach the comfort level of 240C.