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प्रश्न
Explain why steel is used to make railway lines.
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उत्तर
Steel is used to make railway lines because the particles of steel have fixed positions and show no free movement. This ensures that there will be no change in the shape of the railway lines, which makes it safe to travel.
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संबंधित प्रश्न
Liquids have definite volume but do not have definite shape.
Fill in the following blanks with suitable words :
An element is made up of only one kind of ........
The three important metalloids are.............................. and ..........................
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- pure substances contain only one kind of particles
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- pure substances can be exemplified by all elements other than nickel
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S is a white solid which is used in making ordinary dry cells.
- What could P, Q, R and S be ?
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Define the term matter.
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The movement of particles in liquids is ______.
Define the term matter.
Define the term matter.
Define the term matter.
