Physics 9 Chapter 7 - Properties of Matter - 17

Physics 9 Chapter 7 - Properties of Matter - 17

1. What would happen if an air filled balloon is released under water?

a) The balloon will come to the surface of water
b) The balloon will remain at the bottom of water
c) The balloon will leaked in water
d) The balloon will disappear

2. What would happen if a piece of wood is released under water?

a) The piece of wood will come to the surface of water
b) The piece of wood will become porous in water
c) The piece of wood will remain at the bottom of water
d) The piece of wood will disappear

3. How many years ago, Archimedes noticed that there is an upward force which acts on an object kept inside a liquid?

a) More than three thousand years ago
b) More than four thousand years ago
c) Less than two thousand years ago
d) More than two thousand years ago

4. Archimedes was a ..................scientist?

a) German
b) British
c) Greek
d) Spanish

5. Which scientist noticed that there is an upward force which acts on an object kept inside a liquid?

a) Pascal
b) Einstein
c) Archimedes
d) Newton

6. What is the upward force acting on the object called?

a) Down thrust of the object
b) Up thrust of the object
c) Down thrust of the liquid
d) Up thrust of the liquid

7. Which of the following principle states that: “When an object is totally or partially immersed in a liquid, an up thrust acts on it equal to the weight of the liquid it displaces”?

a) Joule’s principle
b) Pascal’s principle
c) Archimedes principle
d) Ohm’s principle

8. What is the formula for up thrust of the liquid?

a) Up thrust of the liquid = ρ / (g A h)
b) Up thrust of the liquid = ρ (g + A) h
c) Up thrust of the liquid = (ρ g A) / h
d) Up thrust of the liquid = (ρ g A h)

9. According to Archimedes, up thrust is equal to..............?

a) Volume of displaced liquid
b) None of these
c) Weight of displaced liquid
d) Mass of displaced liquid

10. Which of the following is measured by hydrometer?

a) Current
b) Density
c) Pressure
d) Elasticity

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