KPK 9th Class Physics Chapter 9 Transfer of Heat Short Questions Answers
KPK 9th Class Physics Chapter 9 Transfer of Heat Short Questions with answers are combined for all 9th class(Matric/ssc) Level students.Here You can prepare all Physics Chapter 9 Transfer of Heat short question in unique way and also attempt quiz related to this chapter.Just Click on Short Question and below Answer automatically shown. After each question you can give like/dislike to tell other students how its useful for each.
Class/Subject: 9th Class Physics
Chapter Name: Transfer of Heat
Board: All KPK Boards
- Malakand Board 9th Class Physics Chapter 9 Transfer of Heat short questions Answer
- Mardan Board 9th Class Physics Chapter 9 Transfer of Heat short questions Answer
- Peshawar Board 9th Class Physics Chapter 9 Transfer of Heat short questions Answer
- Swat Board 9th Class Physics Chapter 9 Transfer of Heat short questions Answer
- Dera Ismail Khan Board 9th Class Physics Chapter 9 Transfer of Heat short questions Answer
- Kohat Board 9th Class Physics Chapter 9 Transfer of Heat short questions Answer
- Abbottabad Board 9th Class Physics Chapter 9 Transfer of Heat short questions Answer
- Bannu Board 9th Class Physics Chapter 9 Transfer of Heat short questions Answer
Helpful For:
- All KPK Boards 9th Class Physics Annual Examination
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KPK 9th Class Physics Chapter 9 Transfer of Heat Short Questions Answers
Why white clothes are preferred wearing in summer? Explain briefly?
Darker colour absorbs more heat than light ones so we will stay cooler with white or light clothing. It is also due to the fact that the white clothes reflect solar radiation and absorbs less heat compared to the darker colours so white colours are cooler.
Why is the freezer compartment kept at the top of a refrigerator?
The freezer compartment is kept at the top of a refrigerator because it cools the surrounding air and makes it denser as compare to the air at the bottom. The cool denser air moves down while the warmer air moves up, where it cooled. That is why the freezer compartment. Is kept at the top of a refrigerator.
A black car standing in the sun warms up more quickly than any other why?
The black colour is good absorber of heat. A black car standing in sun, absorbs more sun radiations then any other colours. Therefore the black colour car warms up more quickly.
Why a tiles floor feels colder to bare feet than a carpeted floor?
When a bare foot is put on the floor, more heat is lost by the foot which is absorbed by the tile floor and as a result we feel cool.
If we put our feet on a carpeted floor, we do not feel cool because our feet losses no heat or very less amount of heat to the carpet. That is why a tile floor feels colder to bare feet than a carpeted floor.
How woolen sweaters keep us warmer in winter?
woolen sweaters reflects our body heat back at us and it blocks the cool wind so that woolen sweater keeps us warmer in winter. Also woolen is a bad conductor of heat. It allows very less amount of heat to pass through it. That is why, a woolen sweaters keep us warmer in winter.
In certain places, birds can fly for hours without flapping their wings. Explain
In certain places there are strains of hot air which arising from the Sun. The stream of hot air called thermals. On these thermals places the birds can fly for hours without flapping their wings.
Good quality thermos bottle is double walled and evacuated between these walls, and the internal surface are like mirrors with a silver coating. How does this configuration combat heat loss from all three transfer method and keep the bottles contents your coffee hot?
Thermos flask consists of double walled glass vessel silvered on the inside.
The purpose of the silvering is to reflect all radiant heat trying to enter or leave the vessel. The space between the walls is highly evacuated (vacuum is created) to prevent convictions the glass being a poor conductor minimizes conduction of heat as well. The Heat loss through the flask is so small that a hot liquid place in the flask will remain hot for a very long time. A cold thing placed in the flask will remained cold for a long time because the flow of heat from the outside will also be very small.
A piece of wood lying in the sun absorbs more heat than a piece of Shiny metal. Yet the metal feels hotter than the wood when you pick it up. explain.
Metal feels hotter than the wood because the number of free electrons in metal are greater than that of wood due to which metals absorbs more heat than wood.
We know that good absorber are good radiator therefore metal are also good radiator. Metals release heat faster than wood due to the free electrons in their outermost shell, thus when we touch the metal surface heat flows quickly to our body as compared to that of wood. On other words we can say that due to the difference of thermal conductivity metal feels hotter than wood.
Some pot handles remain cool during cooking while others become unpleasantly hot what determines which handles remain cool and which become hot?
Cooking pots and pans are made of metals which are good thermal conductor heat comes in mostly by conduction from the body of the pot to the pot handles.
Pot handles are usually made of plastic and Woods because they are poor conductor of heat.
Thus handles are made up of wood and plastic are felt cool and handle made by metals are felt hot.
When sunlight was the land beside a cool body of water a breeze begins to flow from the water toward the land. Explain.
It is due to the difference between specific heat capacities of water and land. During the day the sun shines equally on land and sea. Due to low specific heat the land heats of more quickly than the water. The hot air over the land Rises and the cold air from the Sea blows to replace it. So during the day a breeze begin to flow from the water towards the land. Due to difference in specific heat capacities of water and land.
