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The SI unit of density is: 

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Important Questions on Gravitation

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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 16
The SI unit of relative density is:
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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 17
 The ratio between the mass of a substance and the mass of an equal volume of water at 4 °C is called
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9th CBSE
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Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 18
A body has density 9.6 gcm-3. Its density in SI system is:
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Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 19
The density of gold in SI system is 19600 kg m-3. Its density in CGS system is:
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Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 20
The relative density of zinc metal is 4.2. Its density in SI system is:
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9th CBSE
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Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 21
Density of mercury is 136000 kg m-3. Its relative density is:
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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 1

What do you understand by the following terms?

(a) Upthrust  (b) Buoyancy

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9th CBSE
IMPORTANT
Core Science Physics For Class 9>Chapter 3 - Gravitation>EXERCISE>Q 2
State the factors which are responsible for the buoyant force.