a.Washing of clothes and dishes is more effective with hot water tham with cold water
b.The property of surface tension helps in clinical test for jaundice
c.hot air is filled in balloons for meteorological observations
d.We use a pressure deodrant can for a few seconds, the can tends to become cooler
e.When the ping pong ball, a toy of the children,gets dented without being punctured.What do we do to regain the original shape and why?