Why do tea bags fly after it burn out ? Explain
Answers
heya,
The flying tea bag. ... The burning causes a column of hot air and gas from combustion to rise above it due to convection. When the bag is light enough, it will be carried up into the convection current.
might help u!!
thank you!!
Answer:
Explanation:
Anyone for tea with a twist of lemon? Well here are
a few new twists to the delightful ‘flying tea bag’
activity. This has been around in various incarna-
tions for some time. In an early version a cylinder
is formed from tissue and glued together using tiny
pieces of gummed envelope flap. This is used as
part of a magic trick to extract a dollar bill hidden
in the burning tube (Brown 1984). More recently
it has appeared in the Physics Teacher as the ‘eth-
nic rocket’ (Edge 1997) and in a very safety-con-
scious form on a science supplier’s website (Carolina
Biological Supply Company 2003).
I find that the tea bags that work best are those
made from a tube of gauze folded in half that have
a paper tab and thread stapled to them. You should:
● gently remove the staple and unfold the tea bag
into a long cylinder;
● discard the tea leaves or use them to make
yourself a cuppa in the traditional way;
● stand the tea-bag cylinder upright on a saucer or
other non-flammable surface and light the top
of the tea bag using a lighter or match.
The photograph on the left (above) shows the tea
bag a couple of seconds after it was lit. The bag
burns down and when there is about a centimetre
of gauze remaining – just when you think nothing
further will happen – the burning tea bag rises into
the air and floats almost to the ceiling. The photo-
graph on the right shows the tea bag at the point of
lifting off. The remains of the burned gauze slowly
falls back down to the floor as a fine clump of ash