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1. Define one calorie.
 
One calorie is defined as the amount of heat or thermal energy required to  the temperature of  of water through .
 
2. What is co-efficient of cubical expansion?
 
When we heat a solid, if there is , this is called Cubical expansion. It is also known as Volumetric expansion.
 
The amount by which  when the temperature  is called the coefficient of cubical expansion.
 
It can be represented by the symbol,
 
3. State Boyle’s law
 
Boyle's Law:
In , Robert Boyle investigated the relationship between volume and pressure of a gas of a fixed amount at a constant temperature.
 
A statement of Boyle's law is as follows:

When the  of a gas is , the  of a fixed mass of gas is  to its .