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9th Class Physics Chapter 8 Online Preparation
9th Class English Medium Subjects
9th Class Urdu Medium Subjects
Online Short Questions For Chapter 8 "9th Class Physics English Medium Chapter 8 Preparation "
Try The Short Questions For 9th Class Physics English Medium Chapter 8 Preparation
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Total Questions10
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Available Sets11
Physics (New Book) - 9th Class Physics English Medium Chapter 8 Preparation
Question # 1
How temperature determines the direction of flow of heat
- Ans 1: Temperature determines the direction of flow of heat as it flows from a hot body to a cold body until thermal equilibrium is reached
- Ans 2: Example: When a cup of hot tea or water is placed in a room it cools down gradually it stops cooing as it reaches the room temperature.
Prepare Complete Set Wise Questions For Chapter 8 "9th Class Physics English Medium Chapter 8 Preparation "
9th Class Physics English Medium Chapter 8 Preparation - Set 1
Question # 1
How temperature determines the direction of flow of heat
- Ans 1: Temperature determines the direction of flow of heat as it flows from a hot body to a cold body until thermal equilibrium is reached
- Ans 2: Example: When a cup of hot tea or water is placed in a room it cools down gradually it stops cooing as it reaches the room temperature.
9th Class Physics English Medium Chapter 8 Preparation - Set 2
Question # 1
Define volume thermal expansion and temperature co-efficient of volume expansion
- Ans 1: Volume thermal expansion: Solid material expend in volume when heated. This process is called volume thermal expansion.
- Ans 2: Co-efficient of volumetric thermal expansion: The fractional change in the volume of a substance per kelvin change in temperature.
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Ans 3: Unit: SI unit of volume expansion is kThe co-efficient if volumetric thermal expansion
9th Class Physics English Medium Chapter 8 Preparation - Set 3
Question # 1
What is meant by fusion point
- Ans 1: The temperature at which solid starts melting is called fusion point
- Ans 2: Example: The fusion point of ice is
9th Class Physics English Medium Chapter 8 Preparation - Set 4
Question # 1
Write names of types of thermal volume expansion for liquids
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Ans 1: Types of thermal volume expansion for liquids areReal volume eapansion,Apparent volume expansion
9th Class Physics English Medium Chapter 8 Preparation - Set 5
Question # 1
Why temperature of lnd near water remains moderate
- Ans 1: The presence of large water reservoirs such as lakes and seas keep the climate moderate due to large heat capacity of their reservoirs.
- Ans 2: Example: Heat capacity of water
9th Class Physics English Medium Chapter 8 Preparation - Set 6
Question # 1
Define Evaporation
- Ans 1: Evaporation is the changing of a liquid into vapors (gaseous start) from the surface of the loiquid without heating it
9th Class Physics English Medium Chapter 8 Preparation - Set 7
Question # 1
What is the volumetric thermal expansion
- Ans 1: The volume of solid changes with the change in temperature and is called volume thermal expansion or cubic thermal expansion
- Ans 2: Formula v=v(1+b)
9th Class Physics English Medium Chapter 8 Preparation - Set 8
Question # 1
Define volume thermal expansion and temperature co-efficient of volume expansion
- Ans 1: Volume thermal expansion: Solid material expend in volume when heated. This process is called volume thermal expansion.
- Ans 2: Co-efficient of volumetric thermal expansion: The fractional change in the volume of a substance per kelvin change in temperature.
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Ans 3: Unit: SI unit of volume expansion is kThe co-efficient if volumetric thermal expansion
9th Class Physics English Medium Chapter 8 Preparation - Set 9
Question # 1
Why bottoms of cooking pots are made black?
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Ans 1: The bottoms of
coking pots are made black to increase the absorption of heat from life
9th Class Physics English Medium Chapter 8 Preparation - Set 10
Question # 1
What is the thermos flask?
- Ans 1: A thermos flask consists of a double-walled glass vessel.
9th Class Physics English Medium Chapter 8 Preparation - Set 11
Question # 1
How does heating affect the motion of molecules of a gas
- Ans 1: When a gas is heated, the velocityh of the gas molecules increased due to this reason the motionn of molecules of molecules increased which increases the kinetic energy internal energy and temperature of a gas molecules.
