# 9th Class Physics Chapter 7 Important Long Questions 2024

Students if you are looking for the 9th Class Physics Chapter 7 Long Questions Notes if yes? then you visit the right place where you can easily find Physics Chapter No. 7 most important Long questions are only without answers but it is your responsibility to find answers from your 9th class Physics book.

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## 9th Class Physics Chapter 7 Long Questions Notes

• How kinetic molecular model of matter is helpful in differentiating various states of matter?
• Does there exist a fourth state of matter? What is that?
• What is meant by density? What is its SI unit?
• Can we use a hydrometer to measure the density of milk?
• Define the term pressure.
• Show that the atmosphere exerts pressure.
• It is easy to remove air from a balloon but it is very difficult to remove air from a glass bottle. Why?
• What is a barometer?
• Why water is not suitable to be used in a barometer?
• What makes a sucker pressed on a smooth wall sticks to it?
• Why does the atmospheric pressure vary with height?
• What does it mean when the atmospheric pressure at a place falls suddenly?
• What changes are expected in weather if the barometer reading shows a sudden increase?
• State Pascal’s law.
• Explain the working of a hydraulic press.
• What is meant by elasticity?
• State Archimedes principle.
• What is upthrust? Explain the principle of floatation.
• Explain how a submarine moves up the water’s surface and down into the water.
• Why does a piece of stone sink in water but a ship with a huge weight floats?
• What is Hooke’s law? What is meant by elastic limit?
• Take a rubber band. Construct a balance of your own using a rubber band. Check its accuracy by weighing various objects.