Question

give reason:1》when a balloon filled with hot air is placed in a beaker containing cold water,it contracts​

Answer 1

Answer:

When you put the bottle with the balloon into the first jar, the hot water heats up the air in the bottle and makes it expand. ... The expanding gas blows up the balloon. When you put the bottle into cold water, the air cools down again. Cool air hasn't got as much energy, so it shrinks - and the balloon shrinks with it.