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प्रश्न
With the help of a simple diagram how would you show that – solids expand on heating
उत्तर
Solids expand on heating can be shown by two different experiments. The experiments are:
Experiment A: An iron bar is taken and its length measured accurately. The iron bar is then slowly heated for a certain period of time & measured accurately [with a vernier caliper or otherwise]
Observation: It is observed that the iron bar has increased in length on heating.
Experiment B: A simple ball & ring apparatus is taken, which consists of a metal ball which can just pass through the circular metal ring. The metal ball is then heated for a certain period of time.
Observation: After heating, the metal ball does not pass through the ring, since on heating it has expanded in size and hence cannot pass through the ring.
Conclusion: All solids expand on heating.
संबंधित प्रश्न
Convert the following temperature to Celsius scale:
300 K
Convert the temperature of 573 K to the Celsius scale.
What is the (a) common unit of temperature, and (b) SI unit of temperature ?
State whether the following statement is true or false :
Solid carbon dioxide is stored under low pressure.
What do you understand by the term 'latent heat' ? What are the two types of latent heat ?
Under what conditions heat can be given to a substance without raising its temperature ?
Write whether the following statement is true or false:
A gas has no free surface.
Fill in the blank with the correct word Given below.
Intermingling of molecules is called ____
Fill in the blanks with the correct word/s from the bracket.
Ice on absorption of heat converts to ‘X’ a process called ____ [vaporization / melting]. ‘X’ changes to water vapour on ____ [heating / cooling]. Water vapour changes back to ‘X’ on ____ [freezing / condensation]. The constant temperature at which ice changes into ‘X’ is called its ____ [fusion point / melting point / boiling point].
Why does this happen?
Kerosene left open in a dish disappears.
