'The coefficient of linear expansion for a metal is 0.000016 per C'. Explain the meaning of the statement.

'The coefficient of linear expansion for metal is 0.000016 per °C'. Explain the meaning of the statement.

One Line Answer

The given statement states that the change in length of the metal will be 0.000016 m when its temperature changes by 1°C.

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Chapter 5 Heat and Energy
Thermal Expansion | Q 26 | Page 203

A longer rod expands ........... than a shorter rod on being heated to the same temperature.

Two identical rods of copper are heated to different temperatures — one by 5°C and the other by 10°C. Which rod will expand more?

Give scientific reason.

The telephone wires which sag in summer become straight in winter.

What are the different types of thermal expansions?

Define the following term:

Coefficient of superficial expansion

Give reasons for the following:

In cold countries, water pipes burst in winter.

The diagram shows a sketch graph showing a change in volume of a given mass of ice at -5°C to water at 15°C.

(i) Why does the temperature along BC remain constant?

(ii) When is the volume of water minimum?

(iii) At what temperature does water have maximum density? Explain.

A bimetal strip is shown in the below diagram before heating. Draw a diagram to show how it bends on heating and on cooling.

Assertion: Gas is highly compressible than solid and liquid
Reason: Interatomic or intermolecular distance in the gas is comparably high.

The expansion in volume is called linear expansion.