When soggy biscuits are kept inside the fridge for sometime they become crisp because :

A glass bottle containing water tightly corked breaks when it is kept in freezer, because -

Pressure cooker cooks food in lesser time because

In the night of strong wind, dew is not formed because

In cold weather, aquatic animals survive even when water at the top layer of the lake freezes into ice because –

A fan produces a feeling of comfort during the hot weather because