A balloon fixed to the neck of a bottle gets inflated if the bottle is placed in a bowl of hot water. Why?

Why is a coin placed in a bowl of water appears raised?

Give reason Why does the balloon inflate when the bottle is put in hot water?

If a bowl in formed from the same steel piece then it can float in water. Why?

Why is an egg kicked out of a bottle when air is blown inside the bottle?

If water in a closed bottle is taken up to the moon and open, the water gets

A 250cm^3 glass bottle is completely filled with water at 50^@C . The bottle and water are heated to 60^@C . How much water runs over if: a. the expansion of the bottle is neglected: b. the expansion of the bottle is included? Given the coefficient of areal expansion of glass beta=1.2xx10^(-5)//K and gamma_("water")=60xx10^(-5)//^@C .

A glass stopper stuck in the neck of a bottle can be removed by pouring hot water on the neck of the bottle. Explain why?

An empty glass bottle is fitted with a narrow tube at its mouth. The open end of the tube is kept in a beaker containing water. When the bottle is heated, bubbles of air are seen escaping into the water. Explain the reason.

A cylindrical massless cord of length l=10cm and radius r=3cm is slowly extracted from the neck of a bottom opened bottle. If the normal pressure between the botle and un-extracted part of the cork at any instant is constant and equal to P=(10^(5))/(pi)N//m^(2) , find the work done (in Joule) in extracting it completely. The coefficient of friction between the cork and bottle is mu=0.3

The diagram below illustrates iodine test for the presence of starch in a leaf Why is the leaf again boiled in hot water?