In general, on heating metals _______a)contractb)expandc)can expand or contractd)none of theseCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

When a metal ring is heated, does the hole expand, contract, or stay the same size? Spoiler alert: The puzzle is answered in the update at the end of this post. Most solids expand when heated and contract when cooled. Water/ice is anomalous in that it expands when cooled, at least near its freezing point.

Answer

There is conduction of heat when we heat a metal rod from one point then the heat expand from high temp to low temp....so the correct answer is B.

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When a material is heated, the kinetic energy of that material increases and its atoms and molecules move about more. This means that each atom will take up more space due to its movement so the material will expand.

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Yes

Answer

Expand

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Answer:

Introduction:
When metals are heated, they undergo a physical change in their dimensions. The change in dimensions can either be an expansion or a contraction. The correct answer to the given question is option 'B' which states that metals generally expand on heating.

Expansion of metals:
When metals are heated, the kinetic energy of the metal atoms increases. This increased kinetic energy causes the metal atoms to vibrate more vigorously. As a result, the average distance between the metal atoms increases, leading to an expansion in the dimensions of the metal.

Reason for expansion:
The expansion of metals occurs due to the breaking of metallic bonds. In a metal, the atoms are held together by metallic bonds, which are a result of the sharing of electrons between the metal atoms. When the metal is heated, the increased kinetic energy causes the metal atoms to vibrate more vigorously, thereby weakening the metallic bonds. As a result, the metal atoms move further apart, leading to an expansion in the dimensions of the metal.

Examples of expansion:
1. When a metal rod is heated, it expands in length. This can be observed in the case of railway tracks where gaps are left between the sections of the track to account for the expansion that occurs due to changes in temperature.
2. Similarly, when a metal strip is heated, it expands in width. This property is utilized in the bimetallic strip used in thermostats, where two different metals with different expansion coefficients are bonded together. As the temperature changes, the bimetallic strip bends due to the differential expansion of the two metals.

Conclusion:
In conclusion, metals generally expand on heating due to the increased kinetic energy of the metal atoms, which weakens the metallic bonds and causes the metal atoms to move further apart. This expansion property of metals is utilized in various applications and is an important characteristic of metal behavior.

Answer

On heating its bond starts breaking and due to this it starts to melt and expand....

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