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Application of Sets

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• Elements and Compounds

Q

Fire is not a substance so its meaning less to define its state.

A
• Motion and Its Kinds

Q

Unit of weight = Newton
Unit of kilogram force = 9.8 Newton
so, 1 Unit of kilogram force = 9.8 times Unit of weight

A
• Traingle

Q

A
• Ratio and Proportion

Q

Let the ratio of amount that kamal and kanta get be 5x and 8x.
Amount got by kamal = 2500
so, 5x = 2500
so, x = 500
so, share of kanta = 8x = 4000

A
• Ratio and Proportion

Q

Given ratio between A & B is 2/5:5/7
A : B = 14 : 25� [converted into simplest form]
A's part = 3900*14/39 = 1400
B's part = 3900*25/39 = 2500

A
• Measurement of Mass

Q

4. 916000   g / m rase to power  3

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• Density

Q

Relative density is defined as a ratio of density of particular substance with that of water.
If the relative density of a substance is less than 1 then it is less dense than the reference, if it is greater than 1 it is denser than the reference. If it is 1 then the densities are equal, that means equal volumes of the two substances have the same mass.When the reference material is water then a substance which has a relative density less than 1 will float and a substance with a relative density greater than 1 will sink.
The temperature and pressure must be specified for both the sample and the reference.
In this way, the knowledge of relative density can help in verifying the purity of a substance.

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• Density

Q

density is weight per unit volume ,it's s.i  unit is kg per cubic metre.

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Q

A POLYGON HAVING 4 LINE SEGMENTS.

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• Q

Ozone is a molecule composed of three oxygen atoms. The chemical symbol of ozone is Oas the symbol of oxygen atoms is O. Ozone is a gas found in the atmosphere in very trace amounts. It provides a protective layer surrounding the earth atmoshphere which protects from ultraviolet rays.

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