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9th Class Physics Chapter 7 Online Preparation
9th Class English Medium Subjects
9th Class Urdu Medium Subjects
Online Short Questions For Chapter 7 "9th Class Physics English Medium Chapter 7 Preparation "
Try The Short Questions For 9th Class Physics English Medium Chapter 7 Preparation
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Total Questions10
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Available Sets8
Physics (New Book) - 9th Class Physics English Medium Chapter 7 Preparation
Question # 1
How Kinetic molecular model of matter is helpful in differentiating various states of matter
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Ans 1: Matter is made of particles called molecules.Molecules remain in continuous motionMolecules attract each other.
Prepare Complete Set Wise Questions For Chapter 7 "9th Class Physics English Medium Chapter 7 Preparation "
9th Class Physics English Medium Chapter 7 Preparation - Set 1
Question # 1
How Kinetic molecular model of matter is helpful in differentiating various states of matter
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Ans 1: Matter is made of particles called molecules.Molecules remain in continuous motionMolecules attract each other.
9th Class Physics English Medium Chapter 7 Preparation - Set 2
Question # 1
On which principle ships and submarines float on surface of water and why
- Ans 1: Ships and submarines float on surface of water on the principle of flotation It floats over water when the weight of water equal to its volume is greater than its weight
9th Class Physics English Medium Chapter 7 Preparation - Set 3
Question # 1
Define Atmosphere.
- Ans 1: Earth surrounded by cover of air is called atmosphere.
9th Class Physics English Medium Chapter 7 Preparation - Set 4
Question # 1
Define Young's modulus.
- Ans 1: The ration of stress to tensile strain is called Young's modulus. Formula: Young Modulus= Stress/Tensile strain
9th Class Physics English Medium Chapter 7 Preparation - Set 5
Question # 1
It is easy to fill air in a balloon but it is difficult to remove air from a glass bottle.
- Ans 1: It is easy to fill are in a balloon we can enter air until pressure inside the balloon is equal to the atmospheric pressure. But it is difficult to remove air from glass bottle because inside the glass bottle air pressure is low and atmospheric pressure is high
9th Class Physics English Medium Chapter 7 Preparation - Set 6
Question # 1
What is upthrust
- Ans 1: Upthrust: Upthrust is force act on a body upward when immersed in fluid is equal to the weight of dispaced water
9th Class Physics English Medium Chapter 7 Preparation - Set 7
Question # 1
Write the application of Archimedes principles
- Ans 1: Archimedes principle is used in designing ships and submarines. The floating of a big ship is based on Archimedes Principle.
9th Class Physics English Medium Chapter 7 Preparation - Set 8
Question # 1
Differentiate between stree and strain
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Ans 1: Stress: Force acting on unit area at surface of body is called stressFormula: Stress=F/A
- Ans 2: Unit: It unit is Nm
- Ans 3: Strain: The ratio between change in object and original object is known as strain. When stress acts on a body it may change its length volume, or shape.
- Ans 4: Formula: Srain =Change in object/Original object
- Ans 5: Unit: It has no ujnit due to ratio between similar quantities.
