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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
Why water is not suitable to be used in a barometer
- Ans 1: Water is lighter than mercury To measure atmospheric pressure at sea level a glass tube more than 10m long is required to make a water barometer, which is difficult to a handle.
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
Why water is not suitable to be used in a barometer
- Ans 1: Water is lighter than mercury To measure atmospheric pressure at sea level a glass tube more than 10m long is required to make a water barometer, which is difficult to a handle.
9th Class Physics English Medium Chapter 7 Preparation - Set 2
Question # 1
Why air become thinner and thinner as we go up
- Ans 1: ir decrease with with height and force of gravity also decreases with height so air become thinner and thinner as we go up
9th Class Physics English Medium Chapter 7 Preparation - Set 3
Question # 1
What is the working principle of hydraulic press
- Ans 1: Hydraulic press is a machine which is used to lift heavy objects. It works on the principle of Pascal Law
9th Class Physics English Medium Chapter 7 Preparation - Set 4
Question # 1
Write two examples of Applications of Pascal law
- Ans 1: Pascal's law find numerous applications in our daily life such as automobiles, hydraulic brake system, hydraulic jack hydraulic press and other hydraulic machines.
9th Class Physics English Medium Chapter 7 Preparation - Set 5
Question # 1
Write some important features of kinetic molecular model of matter
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Ans 1: Kinetic Molecular Model of MatterMatter is made up of particles called moleculesThe molecule's remain in continuous motion'Molecules attract each other
9th Class Physics English Medium Chapter 7 Preparation - Set 6
Question # 1
What is meant by deforming force.
- Ans 1: The applied force which changes the shape, length and volume of substance is called the deforming force.
9th Class Physics English Medium Chapter 7 Preparation - Set 7
Question # 1
Explain how a submarine moves up the water surface and down into water
- Ans 1: Submarine floats over water when the weight of the water equal to its volume is greater than its weight Under this condition it is similar to a ship and remain partially above water level When the tanks of submarine are filled the weight of the submarine increases. As soon as its weight becomes greater than the upthrust, it dives into water and remains under water To comes up on the surface the tanks re emptied from seawater.
9th Class Physics English Medium Chapter 7 Preparation - Set 8
Question # 1
Define Atmospheric pressure:
- Ans 1: Pressure exerted by atmosphere in downward direction is called atmospheric pressure.
