Dry ice , as we all know , are solid CO2 (Carbon Dioxide) . It
goes through a process called sublimation , which from solid, turns
into gas , when exposed to room termperature. So , when confined in
a sealed environment (take it that the temperature of the object is
of room temperature) , pressure starts to builds up . Pressure will
continue building up until the object suffers a catastrophic
explosion .
In this video , it shows you how a 2 litre water bottle can wreak
havoc on a small swimming pool .
http://www.youtube.com/watch?v=OAY1iv0zrt8 (this is
not shown in a small swimming pool , but a small plastic bucket
)
and ...
http://www.youtube.com/watch?v=l9ncY3eUnZI&mode=related&search=
..
Ever wondered why the "bombs" are so devastating ? Infact , this is
how atomic bombs are equally devastating . The atomic bombs dont
explode on the ground . Instead , they explode in mid year . This
is so that the explosion can be maximized . How ? Ok .
When the bombs explode in mid air , the energy will travel in all
sorts of direction . On the ground , most energy only travels
upward and sideways ( parallel to the ground ) . The ground absorbs
part of the energy . However , when the bombs explode in mid air ,
the energy thats travelling downwards , will hit the earth and
bounces back into the atmosphere . Hence , the energy is
"reflected" and multiplied . Same goes to the "bombs" in these
videos .
If you have noticed , the bottles dont touch the bottom of the
bucket or the pool , just like what happen to the atomic bomb .
When the bottles explodes , the energy that's travelling downwards
gets reflected at the bottom and travels upwards instead , hitting
the surface of the water . The cycle repeats itself several times ,
hence the energy is multiplied . Thats why when you watch the
second video , when the bottle explodes , ripples and shockwaves
can be seen on the water surface , even before the air (CO2) hits
the surface . If such energy is strong enough and happens at sea,
it can cause a Tsunami . Halifax harbour , in Canada , suffers a
sad tragedy as a ship carrying ammunition exploded , the same way
the bottles exploded .
