State why it is necessary to leave an air space in a closed glass bottle of water when it is to be kept in a refrigerator.

​K.C.S.E Physics Q & A - MODEL 2013PP1QN12

State why it is necessary to leave an air space in a closed glass bottle of water when it is to be kept in a refrigerator.

answer

• Allow for expansion;
• Water expands on cooling between 4° C and 0 C;