Pressure Experiments.
The following experiments are included to show to you the power
of a vacuum and air pressure that surrounds us.
Glass Tumbler
PLace some water in a glass tumbler ,surprisingly it does not
need to full as some suggest.
Place a piece of cardboard or playing card over the top of glass
and with a hand holding card in place.
Tip card and glass tumbler over quickly and remove you hand and
the air pressure from the outside and the vacuum inside will
hold the card and water in place without pouring onto the
ground if done properly.
Egg in Milk Bottle
If you can get a milk bottle you can perform this experiment.
and a not too big fresh egg and piece of paper and a lighter.
Put a slight splash of water around the top of the milk bottle
to allow slight lubrication. Light a piece of paper and drop
into milk bottle wait until the paper has nearly burn out and
place egg on the neck of the bottle.
When the air inside of bottle has cooled it creates a slight
vacuum in milk bottle and the outside pressure forces the egg
inside bottle.
If you soak the egg in vinegar it will remove the outer shell
and may make it easier to perform the experiment.
Now that you have got the egg in the bottle how do you get it
out?
The only way I have seen is to put the bottle in your mouth and
with lips around entire bottle give a strong blow and then put
the egg into inside of neck of bottle. Keep blowing until egg
starts to move through neck to outside.
There is another way however
pour hot water into the bottle
pour the egg into the neck
and wait for the air inside the bottle to heat up
and wait for the air pressure to build up and push the egg
out.
You could probably do the above experiment like this with a small
blown up balloon and a glass jar. The balloon would certainly be
easier to remove than the egg.
This I have seen this happen by accident.
A hot coffee cup that has just been finished with and still hot
is turned upside down on plastic place mat. What happens when
the coffee cup cools there is a partial vacuum created inside
the cup and the place mat is drawn into the cup and a seal is
formed around the lip of the cup. When the cup is picked up
later the place mat goes with it too.
Electrokinetic Apparatus Invented by T.T. Brown Filed July 3
1957 number 2,949,550
This device consisted of two disk shaped devices mounted on a
freely revolving platform which carries two high voltage charges
one positive and one negative supplied by a high voltage
source.
The disks themselves are made of a dialectic centre, upon which
are placed two conductors on the rims, one being made positive
and the other one being made negative.
Both saucers have electrical connections the same, that is both
of the back conductors on each disk are positive and the front
conductors are negative.
The two conductors on any single disk should be far enough
apart to prevent voltage sparking crossover between the two
conductors on the said disk.
Upon applying the high voltage to both disks the apparatus began
to revolve around the centre post gradually gathering speed.
