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Sunday 12 July 2020

PHYSICS: PROPERTIES OF MATTER:, WORKSHEET- class 9-ch 7FUSION STORIES


 PHYSICS, CH 7: PROPERTIES OF MATTER:, WORKSHEET- class 9
Physics Worksheets class 9



Q 1. Fill in the blanks:  32

1.  ---------------------- is used to explain the three states of matter.

2.  Gases are lighter than -------------------.



3.  Plasma also exist in -------------- and ----------- when they glow.

4.  Plasma is highly ---------- state, it allows electric current to pass through it.

5.  -------------- of a substance is defined as its mass per unit volume.

6.  MASS = Density * -----------.

7.  1 meter cube = ---------- litres.

8.  1 litre = ----------------- m3

9.  1000 ---- = 1 gcm-3

10.           We can calculate density if we know the ----- and ----------.

11.           Pressure is a ------------------ quantity.

12.           If a wooden block measuring 40 cm, 10 cm, 5 cm has a mass of 850 g. Find density of wood?

13.           Air pressure inside balloon is equal to the -------------- pressure.

14.           At sea-level atmospheric pressure is about ---------- pa or --------------- Nm -2.

15.           A simple barometer is ------------- barometer.

16.           It is common to express atmospheric pressure in terms of the ----------- of Mercury.

17.           The head of a pin is a square of side 10 mm. The pressure on it due to a force of 20 N is ----------.

18.           Mercury is --------------- times denser than water.

19.           Atmospheric pressure is -------- on mountains.

20.           -------------- Applied at any point of a liquid enclosed in a container, is --------------- without loss to all other ---- of liquid.

21.            Liquid pressure at depth h = P = ---- ---- h



22.           P = F/?



23.            The ----------------- system of vehicles also work on Pascal’s law.

24.           Liquids transmit pressure in all directions, this is called -------------------.

25.           When a body is immersed wholly or partially in liquid, it loses its -------------- equal to the ------- of liquid displaced. This is known as ------------ Princile.

26.           The ratio of change of ------------------ to the original ------------ is called tensile ----------.

27.           The ratio of stress to ------------ --------------- is called ---------------- modulus.

28.           Young’s modulus = Stress / ?

29.           SI Unit of Young’s module is -------------------- (---------).

30.           Strain in body is ---------  stress in body

31.           ------------------------- is applicable to all kinds of deformation and all types of mater.

32.           If a wooden block measuring 40 cm, 10 cm, 5 cm has a mass of 850 g. Find density of wood?
           

     Q 2. Write short answers:  7

  1.         Features of Kinetic Molecular model
  2.         Why do gases put pressure on container?
  3.         How we get plasma- state of matter?
  4.         What is pressure, its equation and Unit?
  5.         Explain pressure in liquids with cylinder example.
  6.         Write three uses of Pascal Law around you?
  7.         Explain Elasticity?


Q 3. Guess who am I?  8


  1.   I’ve fixed shape & volume and vibrate around mean position

        
          2. Molecules can slide over one another.
              ------------------------------------------------- 
          
           3. My molecules move with high velocity
               -----------------------------------------------

4. Gas occur in ionic shape


5. I’m a cover of air on earth


6. I can determine the change in weather?


7. Weight must be equal or less than me to object to float?

     
        8. I’m not suitable to be used in barometer and why?
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