BURN AND LIFT – ENGLISH – Lift a glass with a balloon

BURN AND LIFT – ENGLISH – Lift a glass with a balloon


in this wonderful activity you will be able
to lift a glass by just burning a piece of paper. you just need a transparent glass,
some water and a balloon. first take this glass and this should be thick enough, may
be a borosil glass which can withstand a burnt paper inside it. so lets do that first. you
might need some adult supervision. after the paper has burnt blow a balloon, dip it in
water and put it on the top of the glass. wait for sometime and you see what happens.
you can see that the balloon has actually protruded inside the glass and if you now
lift the balloon the glass lifts up along with the balloon. we didn’t apply any gum
on the balloon. its just that when we dipped in water we made sure that it seals tightly
with the glass. so what is happening? why is it that the balloon was able to lift the
whole glass? when we burnt the paper inside the glass the air inside the glass was hot,
temperature was more. and when we closed the glass with the balloon and later on when the
temperature reduced the volume of the gas inside reduced and hence it pulled the balloon
inside. since we had applied water on the balloon it sealed the whole glass and hence
the balloon was able to lift the whole glass. it is a myth that the volume inside the glass
reduces because the oxygen is consumed. in fact burning of the oxygen produces twice
as many other gases as the amount of oxygen that is consumed. so burn and lift. with a
small fragile balloon you can lift a much heavier glass. have fun.

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