KPK 9th Class Physics Chapter 8 Thermal Properties of Matter Short Questions Answers
KPK 9th Class Physics Chapter 8 Thermal Properties of Matter Short Questions with answers are combined for all 9th class(Matric/ssc) Level students.Here You can prepare all Physics Chapter 8 Thermal Properties of Matter 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: Thermal Properties of Matter
Board: All KPK Boards
- Malakand Board 9th Class Physics Chapter 8 Thermal Properties of Matter short questions Answer
- Mardan Board 9th Class Physics Chapter 8 Thermal Properties of Matter short questions Answer
- Peshawar Board 9th Class Physics Chapter 8 Thermal Properties of Matter short questions Answer
- Swat Board 9th Class Physics Chapter 8 Thermal Properties of Matter short questions Answer
- Dera Ismail Khan Board 9th Class Physics Chapter 8 Thermal Properties of Matter short questions Answer
- Kohat Board 9th Class Physics Chapter 8 Thermal Properties of Matter short questions Answer
- Abbottabad Board 9th Class Physics Chapter 8 Thermal Properties of Matter short questions Answer
- Bannu Board 9th Class Physics Chapter 8 Thermal Properties of Matter short questions Answer
Helpful For:
- All KPK Boards 9th Class Physics Annual Examination
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KPK 9th Class Physics Chapter 8 Thermal Properties of Matter Short Questions Answers
Ordinary electric fan increase the kinetic energy of the air molecules caused by the fan blades pushing them mean the air temperature increases slightly rather than cool the air? Why use it?
An ordinary fan doe not actually cool -3the room, but , they increase the kinetic energy of air particle. The temperature of air particles increases slightly. These high speed particles hit us and evaporate our sweat making us for a cooling effect.
The circulating air of fan removes the heated air from close to the body and replaces it with cooler air. Fans are also used to keep the air particle in moving.
Why a small gap left behind the girders mounted in walls?
Gaps are left at the ends of iron girders and steel bridges to give room for expansion. Usually one end is fixed and the other and allowed expand in summer into the left gap.
Why you should not put a closed glass jar into a campfire. What could happen if you tossed an empty glass jar, with the lid on tight, into a fir?
When we put a sealed glass jar into a campfire it will explode due to high internal pressure.
Its reason s that the temperature and pressure inside the glass jar increases, due to high internal pressure, the jar may explode and turn into pieces.
If we tossed an empty glass jar into a campfire, then due to high internal pressure or expansion in jar may cause it crack or shatter with force. So we should not throw a glass jar into a camp fire.
Explain w it is advisable to a water to an overheated automobile engine only slowly, and only with the engine running.
When we add water quickly to an over heated engine some metallic. Parts of the engine will cool down, while other parts of the engine will not cool. Some water will quickly turn to steam and will expand rapidly which can result a crack engine block or radiator due to thermal stress or the emission of high temperature steam from the radiator.
Why steam at 100 °C produce more severe burns than boiling water at 100°C?
Steam at 100 °C produce more severe burns than boiling water at 100 °C because steam contain 536 calories per gram of heat more than water at the same temperature.
Why is ice at 0 °C a better coolant of soft drinks than water at 0 °C?
The ice at 0 °C is better coolant than that of same amount of water at 0 °C.
When the ice is put in the soft drink it absorbs heat from the water at 0 °C, when it absorbs heat its temperature rises.
Why we feel cool after perspiration?
When the sweat drops evaporate from our skin it absorb heat from our body and as a result we feel cool.
An iron rim which is fixed around a wooden wheel is heated before its fixture. Explain why?
An iron rim can be tightly fixed into the wooden wheel. At room temperature the diameter of the ring is slightly less than diameter of the wooden wheel. Therefore the ring is heated which expands on heating and can be easily placed around the wooden wheel. When the ring comes to room temperature it contracts and produces tight fit.
Explain why cities like Karachi situated by the ocean tend to have less extreme temperatures than inland cities at the same latitude.
Coastal areas like Karachi have moderate temperature than inland areas because of the high specific heat capacity of water of the sea.
During the day the sun shines equally on land and sea. The land heats up more quickly than sea. The hot air over the land rises and the cold air from the sea blows to replace it. Thus there is a sea breeze during the day.
At night the land cools more quickly than the sea. The hot air over the sea rises and the cold air from the land blows to replace it. This movement of air is called the land breeze. Due to such movement of air, cities like Karachi situated by the ocean tend to have less extreme temperature than inland cities at the same latitude.
