When we stir a liquid vigorously, it becomes warm. Is it a reversible process?

When a liquid is stirred vigorously. It becomes hot. Is it a reversible or an irreversible process? Explain.

When a liquid is cooled, it becomes a …………………….

Charging process of battery is a reversible process.

When stirring of a liquid is stopped, the liquid comes to rest due to

When the rivers and lakes start freezing, the weather becomes warm. Give reason.

A stirred liquid comes to rest after sometime. Why?

Potassium chloride is added to water and stirred. A salt solution is obtained which is then boiled leaving behind a residue. Is the change reversible or not reversible

When we rub our hands they become warm. Have we supplied heat to the hands?

When we rub our hands they become warm. Have we supplied heat to the hands?