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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
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
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
Why bottoms of cooking pots are made black?
-
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 2
Question # 1
Give the names of factors on which evaporation of a liquid depends
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Ans 1: The rate of evaporation is affected by following factorsTemperature, Surface area, wind , nature of liquid
9th Class Physics English Medium Chapter 8 Preparation - Set 3
Question # 1
Which flower is used as natrual thermometer?
- Ans 1: The crocus flower is a natural thermometer. It opens when temperature is precisely 23 oC and closes when temperature drops.
9th Class Physics English Medium Chapter 8 Preparation - Set 4
Question # 1
Write down the values of coefficient of Gold and Silver
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Ans 1: Co-efficient of = God 1.3*10kCo-efficient of = Silver 1.93*10
9th Class Physics English Medium Chapter 8 Preparation - Set 5
Question # 1
Define thermal expansion
- Ans 1: Thermal expansion: Expansion due to heating is called thermal expension
- Ans 2: Explanation: Most of the substances solids liquids and gases expand on heating and contract on coaling. The Kinetic energy of the molecules of an object depends on its temperature. The molecules of a solid vibrate with larger amplitude at high temperature than at low temperature.
9th Class Physics English Medium Chapter 8 Preparation - Set 6
Question # 1
We near white and light colored clothes in summer why?
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Ans 1: During summer most of people preferto wear awhite dress because white reflects
lights . So its order to keep your body temperature normal it, s better to wear awhite dress
9th Class Physics English Medium Chapter 8 Preparation - Set 7
Question # 1
Write formula for heat capacity.
- Ans 1: Formula for heat capacity is. Heat capacity = mc
9th Class Physics English Medium Chapter 8 Preparation - Set 8
Question # 1
Why is ehat called as the energy in trans it
- Ans 1: Heat is the energy that is transferred from one body to the other in thermal contact with each other as result of the difference of temperature between them The transfer of energy continues till both the bodies have the same temperature Heat is therefore called as the energy in trans it
9th Class Physics English Medium Chapter 8 Preparation - Set 9
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 10
Question # 1
Why bottoms of cooking pots are made black?
-
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 11
Question # 1
Define heat capacity of a body
- Ans 1: Heat capacity of a body is amount of thermal energy absorbed by it for one Kelvin rise in temperature.
- Ans 2: Unit: Its unit is jk
