Concept explainers
(a)
To Calculate: The rate at which heat must be supplied to the house.
(a)
Answer to Problem 56GP
The rate at which heat must be supplied to the house to maintain the its inside temperature is
Explanation of Solution
Given:
Walls’s thickness is 17.5 cm.
Area of the wall,
Thickness of roof,
Area of the roof,
Uncovered window thickness,
Total area,
Temperatures are
Formula used:
The heat transfer rate by the conduction is calculated as,
Where, k is the constant value, A is the area and
Calculation:
The heat transfer for all three areas such as walls, roof and windows and each area have the same temperature difference. Therefore, the rate is calculated by using the given formula such that,
Conclusion:
The rate at which heat must be supplied to the house is
(b)
To Calculate: The heat the amount of heat that must be supplied to raise the temperature.
(b)
Answer to Problem 56GP
Explanation of Solution
Given:
Walls’s thickness is 17.5 cm.
Area of the wall,
Thickness of roof,
Area of the roof,
Uncovered window thickness,
Total area,
Temperatures are
Time period is 30 minutes.
Volume,
Formula used:
The amount of heat is calculated as,
Where,
Calculation:
The air is heated, and the energy is lost by conduction by adding the energy. Therefore, the required heat for raise the temperature is given as
The heat loss in conduction is directly proportional to the temperature difference between inside and outside which is given as,
So, the average temperature is
Conclusion:
The required heat is
(c)
To Calculate: The monthly cost for the maintenance.
(c)
Answer to Problem 56GP
Explanation of Solution
Given:
Time period is 30 minutes.
Volume,
Heat combustion is
The cost is
Formula used:
The amount of heat is calculated as,
Where,
Calculation:
The amount of heat for the given gas is
The monthly cost is for a month in which there are 30 days are present, is
Conclusion:
The monthly cost is
Chapter 14 Solutions
Physics: Principles with Applications
Additional Science Textbook Solutions
Physics for Scientists and Engineers: A Strategic Approach with Modern Physics (4th Edition)
College Physics
University Physics (14th Edition)
The Cosmic Perspective Fundamentals (2nd Edition)
Essential University Physics: Volume 1 (3rd Edition)
Tutorials in Introductory Physics
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON