Q. If a highly corked glass bottle full of water is left outdoors on a frosty night it will burst. Why?
A. The water contained in the bottle will freeze on a frosty night and convert into ice. There occurs an increase in volume during this transformation. As there is no room available for the increased volume, this may result in bursting of the bottle. Q. What weight of air do we carry?
A. 1 kg per sq. centimetre or 14.72 pounds per square inch.