Qasim Tariq 11-01-2020Notes

After studying this unit, the students will be able to:

  • state kinetic molecular model of matter (solid, liquid and gas forms).
  • describe briefly the fourth state of matter i.e. Plasma.
  • define the term density.
  • compare the densities of a few solids, liquids and gases.
  • define the term pressure (as a force acting normally on unit area).
  • explain how pressure varies with force and area in the context of everyday examples.
  • explain that the atmosphere exerts a pressure.
  • describe how the height of a liquid column may be used to measure the atmospheric pressure.
  • describe that atmospheric pressure decreases with the increase in height above the Earth's surface.
  • explain that changes in atmospheric pressure in a region may indicate a change in the weather.
  • state Pascal's law.
  • apply and demonstrate the use with examples of Pascal's law.
  • state relation for pressure beneath a liquid surface to depth and to density i.e., (P=pgh) and solve problems using this equation.
  • state Archimedes principle.
  • determine the density of an object using Archimedes principle.
  • state the upthrust exerted by a liquid on a body.
  • state principle of floatation.
  • explain that a force may produce a change in size and shape of a body.
  • define the terms stress, strain and Young's modulus.
  • state Hooke's law and explain elastic limit.

Post Tags:

  • 9th Physics Notes
  • 9th Physics Chapter 7
  • Matric Notes
  • Class IX Helping Notes
  • Matriculation Notes
  • Matric Part-1 Notes

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