Ok, now I'm gonna tell you how to build a cool science experiment. It's called the balloon that doesn't pop, or if you would like a more attractive name you may call it the super balloon.
Take a regular balloon, blow it up and put it over a candle's flame. Can you wonder what's gonna happen? yes... it will pop. But look at this balloon, it's over the candle's flame and doesn't pop, what is the secret behind this super balloon?
The secret is..... the balloon is full of water. But how water prevent the balloon to pop? The water has a high specific heat, in other words it need to absorb a lot of heat to increase its temperature. Beside that, the water is a great heat conductor, in this case mainly by convection. So the balloon doesn't reach the temperature enough to melt its polymer and pop.
How does a lightning form? And how does it behave?
These two questions are hard to answer because the lightning happens so fast that we see just a blinding light coming from the sky followed by a deafening thunder.
What, in ancient times, was considered divine powers, today is explained and detailed observed with help of science.
This video shows a slow motion lighting behavior.
We can see the three kinds of lightning: cloud to the ground, ground to the cloud and cloud to cloud.
Is also possible to see how the discharge follows the ionized air of the previous discharge.
When two materials are rubbed a kind of effect appears, they become charged. The polarity (what material will become positive and what will become negative) is given by the triboelectric series.
Usually, physics teachers use a pipe and a cat or rabbit hide to demonstrate this effect. This video shows how a children playing on a plastic slide can generate static electricity.
Both, children and slide become charged and that can be noted because the children’s hairs stand on end.
Flutter Effect is a self-feeding mechanism in which aerodynamic forces on a object (This case an airplane wing) are coupled with the natural mode of vibration of this object to produce a periodic and, sometimes, destructive motion.
This video shows a pumpkins cannon. It uses compressed air to accelerates the pumpkins through out a long pipe. As bigger the pipe, more time the pumpkin is accelerated, so higher is the inicial velocity. At a 45 degress angle the pumpkin reach the maximum horizontal distance.
Nitrocellulose, an explosive similar to nitroglicerin but, instead of glicerin, it has cellulosis on its composition. It is not sensitive to impact just to heat.
It burns so fast that there is no time to exchange heat with the hand
This video shows how to play tennis using a soap bubbles and a carpet racket. The soap bubbles are formed by a doubled layer of soap at extremities and a layer of water at center.
The polar part of soap molecules are bonded to the water and the nonpolar part are on the outer side.
Carpet is composed of polyester, as the bubble's outer side, so the interaction between them is very weak and the bubble do not pop out.
Each chemical element has its own Identity given by the color emited when it is burning. The colors in fireworks is due a diferent kind of elements. Copper give the color green, sodium give the yellow one. This video shows a lot of diferent elements and its correspondent colors.
"Innovative technology often can make yesterday's science fiction into today's reality. This is particularly true with a prosthetic hand that brings to life fictional accounts of artificial, computer-driven replacement body parts. The bionic hand, called the I-Limb,was named one of the top 50 inventions this year by Time Magazine." From youtube description