What is meant by thermal insulation? - Physics

What is meant by thermal insulation?

One Line Answer

Thermal insulation means restriction of transfer of heat by any means.

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Chapter 5: Heat - Transmission of Heat [Page 226]

Chapter 5 Heat
Transmission of Heat | Q 4 | Page 226

Fill in the blank:

°C is the unit of ......................

Write S.I. unit of temperature.

Name two substances which expand on heating.

Which is more, a calorie or a joule?

What is the unit of coefficient of linear expansion?

Name the substance which contracts when heated from 0⁰C to 4⁰C.

Explain the following:
In a solid, heat is not transferred by the process of convection.

Consider the statement given below and choose the correct option.

Assertion: A system can be converted from one state to another state.

Reason: It takes place when the temperature of the system is constant.

Assertion (A): 0 °C = 273.16 K. For our convenience we take it as 273 K after rounding off the decimal.

Reason (R): To convert a temperature on the Celsius scale we have to add 273 to the given temperature.