Páginas

Monday, April 11, 2011

Thursday, April 7, 2011

Experiments from Ania&Jessika

To draw the balloon charged by the friction to the tiny trickle of water. The trickle of water is leaning toward the balloon. Description: This happens due to polarization of water molecules in an electric field of the balloon. A water molecule forms an electric dipole. Negatively charged balloon attracts the positive charges in the water molecule, water molecules are oriented such that thier positively charged side is closer to the balloon.


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Package from Spain

Polish students enjoyed presents from Spain.
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Wednesday, April 6, 2011

Package for Cyprus from Czech students

Veronika and Lukáš:
There are two photo albums. One is about a castle in Frýdlant and the second is about a chapell Kostnice in Kutná Hora.
In Frýdlant´s castle album you can see wonderful chairs. Albrecht from Valdštejn lived there. He was very good captain of the imperial army. How you can see it´s a very nice castle.
In Kostnice you can see a lot of bones of our famous kings. There is a pyramid of bones. We hope you will like it.

Pavla and Katka:
We are sending BEBE biscuits, because we like it. These are our favourite biscuits, we hope, you will like it.
Bára and Božena:
Orion is typical Czech firm for production of sweets. The Students´ seal is very good chocolate. It's chcolate with peanuts, raisins and jelly. Hope, you will enjoy it!

Eliška:
There are delicious spa biscuits.They are made in Mariánské lázně. Mariánské lázně is a Czech town with a famous spa, it is a place, where people go to cure themselves and to improve their health.I have chosen this present, because we like sweets.

Vojta:
I brought Bohemia chips Grande.It is typical for the Czech Republic and I hope you like it. It is my favorite food. Enjoy it!

Ondra:
Hašlerky are typical Czech bonbons which are named after the famous Czech man Karel Hašler. Karel Hašler was born on 31 October 1879 and he died on 22 December 1941 in Mauthausen. Karel Hašler was a songster, an actor, a composer, a writer, a dramatist and a producer. Enjoy them.

Tereza, Klára and Daniela:
These biscuits are typical Czech sweet. The name of its manufacturer – Opavia comes from a Czech town Opava. Hope you’ll like it.


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Monday, April 4, 2011

Aluminium rod and heat

Jan´s experiment from the Czech team
Pierce the middle of an aluminum rod, slightly above the center of gravity. Hang the rod on a revolving stand. Stick a glass-headed pin in a cork stopper, and use this as the axis of rotation. Put the rod in the horizontal position. Make one side hot. As the rod is heated, this raises the energy of particles and thus increases their weight. So the heated arm is heavier and sinks down :-).
Truth be told. Heat extends the aluminum rod; the center of gravity moves to cause a new rod position, with a stable center of gravity below the point of suspension.