KIPS 9th Class Physics Notes for Chapter 9 (With PDF)


Transfer of Heat, 9th Chapter, KIPS Notes for 9th Class are now ready to download in PDF directly or view online.

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The skin of a polar bear is black, which helps it to absorb more of the heat from the sun.

Do you belong to  Federal Board, Lahore Board, Faisalabad Board, Rawalpindi Board, Sargodha Board, Wah Board? Then these notes are helpful.

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Title: Transfer of Heat

Chapter: 9th Chapter of 9th Class Physics

FileSize: 2.9 MB

FileType: PDF

Pages: 15

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Physicists study the particles that make up the universe, and the forces with which they interact. In this century, physicists have discovered a few basic laws that explain all observed phenomena.

In addition to its intrinsic beauty, physics creates powerful tools that can be used to solve difficult problems in other fields. For example, physicists invented nuclear reactors and lasers. Many important medical imaging devices (MRI scanners) were developed by physicists.

Physics is the study of the simplest and most general things that do not change. It is a model of reality that describes the universe in terms of a small number of numbers and equations. This is the key to understanding physics.

When I was a kid, I thought physics was about memorizing equations, like this one: Force = Mass x Acceleration. Now I know that's just a placeholder for something deeper, which is why it applies to everything from apples to atoms. The real equation for force is: Force = Inverse-Square-Law x Charge x Charge / Distance2. Mass doesn't appear in the equation at all - it's just a ratio, like "miles per hour."

A more accurate way to phrase Newton's law would be: Stuff accelerates unless some other stuff gets in its way. But as we'll see later, even that isn't quite right, because there are types of energy where mass does appear in the equation, such as rest energy. 

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Short Questions
1. How many methods of transmission of heat are used?
2. What is Conduction? Explain the process and write down it usage in our daily life..
3. What are Bad conductors or Insulator?
4. What are Conductors?
5. Write down some uses of conductors and non-conductors.
6. Define convention?
7. What do you know about convection currents in Air? Write down some uses.
8. How land and sea breezes are produced?
9. What is gliding?
10. What do you know about birds gliding?
11. Define Radiation
12. Why tea in a cup becomes cold earlier as compared to a teapot?

The Short Questions With Answers in the Below Images


Long Questions
1. What is Conduction? Explain the process and write down it usage in our daily life
2. On what factors conduction of heat depend? And define thermal conductivity.
3. Write down tbe uses of conductors and non-conductors.
4. What is convection? Explain the process.
5. What do you know about convection currents in Air? How land and sea breeze blow?
6. Define Radiation. How does heat reach us from the sun? Explain Radiation.
7. What is Leslie cube? How various surfaces can be compared by Leslie cube?
8. Explain the application and consequences of Radiations.

Long Questions with Answers in the Below Images



1. In solids, heat is transferred by:
2. What happens to the thermal conductivity of a wall if its thickness is doubled?
3. Metals are a good conductor of heat due to the:
4. In gases, heat is mainly transferred by:
5. Convection of heat is the process of heat transfer ·due to the of the molecules:
6. The false ceiling is done to:
7. rooms are heated using gas heaters by
8. The land breeze blows from:
9. Which of the following is a good radiator of heat?
10.Styrofoam is a:
11. Unit of thermal conductivity is:
12. Why metals are good conductors of electricity?

Short Questions

1. Explain .why?

a) A metal feels colder to touch than wood kept in a cold place?
b) The land breeze blows from land towards the sea?
c) The double-walled glass vessel is used in thermos flask?
d) Desserts soon get hot during the day and soon get cold after sunset.
2. Why conduction of heat does not take place in gases?
3. What measures do you suggest to conserve energy in the house?
4. Why transfer of heat in fluids takes place by convection?
5. What is meant by convection current?
6. Suggest a simple activity show convection of heat in gases not given in the book.
7. How does heat reach us from the sun?
8. How various surfaces can be compared to Leslie cube?
9. What is greenhouse effect?
10. Explain the impact of the greenhouse effect in global warming.

The MCQs, and Short Questions of TextBook With Answers In the Below Images


1. The concrete roof of a house of thickness 20 ·cm has an area 200 m2. The temperature inside the house is 15° C and outside is 35° C. find the rate at which thermal energy conducted through the roof. The value of k for concrete is 0.65 Wm 1 K1.
2. How much heat is lost in an hour through a glass window measuring 2.0 m by 2.5 m when inside temperature is 25° C and that of outside ls 5° C, the thickness of the glass is 0.8 cm and the value of k for glass is 0.8 Wm 1 k 1?

The Numerical With Solution in the Below Images


The material presented here is to help students and only for the educational purpose. 



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Top Study World: KIPS 9th Class Physics Notes for Chapter 9 (With PDF)
KIPS 9th Class Physics Notes for Chapter 9 (With PDF)
Are you looking for KIPS 9th Class Physics notes for Transfer of Heat,then you have come to the right place. You can download or view online with a single click.
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