Physics 9 Chapter 7 - Properties of Matter - 20

Physics 9 Chapter 7 - Properties of Matter - 20

1. What is the density of air?

a) 123.32kgm^-3
b) 1.3 kgm^-3
c) 9.20 kgm^-3
d) 13.600 kgm^-3

2. On which principles, ships are designed?

a) Pascal’s principle
b) Archimedes principle
c) Ohm’s principle
d) Principle of floatation

3. On which principles, boats are designed?

a) Pascal’s principle
b) Archimedes principle
c) Principle of floatation
d) Ohm’s principle

4. On which principles, submarines work?

a) Principle of floatation
b) Ohm’s principle
c) Archimedes principle
d) Pascal’s principle

5. A barge, 40 metre long and 8 metre broad, whose sides are vertical, floats partially loaded in water. If 125000 N of cargo is added, how many metres will it sink?

a) 0.4 cm
b) 4 cm
c) 400 cm
d) 40 cm

6. What is the applied force called that changes shape of a substance?

a) Up thrust force
b) Reaction force
c) Forming force
d) Deforming force

7. What is the applied force called that changes length of a substance?

a) Forming force
b) Up thrust force
c) Deforming force
d) Reaction force

8. What is the property of a body to restore its original size and shape as the deforming force ceases to act called?

a) Stress
b) Conductivity
c) Reactivity
d) Elasticity

9. To which of the following type of force, stress is related?

a) Force of friction
b) Reaction force
c) Deforming force
d) Up thrust force

10. What is the applied force called that changes volume of a substance?

a) Reaction force
b) Up thrust force
c) Deforming force
d) Force of friction

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