The supper balloon - fireproof balloon

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.

Slow Motion ligthning

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.

Triboelectricity - Children playing  on a Plastic slide

Triboelectricity - Children playing on a Plastic slide

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.