CONDITION: one of the researcher tired to cheer me up~
TEMP: 20 C

PROCEDURE:

Three things !!
one hair dryer, one balloon , and one ping pong ball~

1. turn on the hair dryer, hold it underneath steadily ~

2. place the ping pong ball right above the hair dryer and let go, now the ping pong ball should start floating in the center above the hair dryer ~

3. place the balloon next to the ping pong ball~ no matter on the right or left ~ let go, the balloon will float as well ~

wat will happen next ??!!!

????
???

RESULTS:

in the end
the balloon will manage to kick out the ping pong ball, and take the position in the center on its own !!!!

DISCUSSION:

why is tat ?!!!

Because the hair dryer gives more power to the center ~
That means the velocity is greater in the center, and lower on the side ~ according to Bernoulli's Equation, the pressure drops when the velocity increases ~

and molecules move from higher pressure to lower pressure~

Therfore, the balloon will move from the side to the center ~ eventually it will rid off the ping pong ball and take over the place !!!

And just by tat !!! human beings start flying in the air !!! LIFT UP ~~~

i could spend hours just staring at tat balloon floating in the air~ it's sort of following a rhythm and dancing on its own !!! until it did the thing, cick off the ping pong ball. and get its position !!! such a show !!!

CONCLUSION:

wat do u see ?! i see beauties ~

science could be the most beautiful thing i ever seen ~

sometimes i wonder why am i doing it ?!! the reseacher answers me within 5 mins & only using 3 things !!!

i have to agree:

YEAH ~~ IT IS NOT ALWAYS SUCCESSFUL, BUT IT IS ALWAYS FUN !!!


pic: the battle between balloon and ping pong ball~ haha ~