Wednesday, June 30, 2010

Saturday, June 26, 2010

Good Bye Party Experiments

Czech group ended the project with Good Bye - party with Skype connection with Polish partners. While we waited for the connection, we remembered some of our experiments.

video

Good bye project party

video

Thursday, June 24, 2010

Oscilaciones con una vela (Oscillations with a candle)

Para realizar nuestro experimento necesitamos una vela y una varilla metálica.
Materials, we need a candle and a metal stick.

En primer lugar, retiramos un poco de cera de la base de la vela para poder encenderla por los dos extremos. Luego determinamos el centro de gravedad de la vela, el centro geométrico, con ayuda de un metro y clavamos la varilla metálica en ese punto, calentando la varilla resulta más fácil introducirla.
At first time, we removed a bit of warx of the candle base to be able to ignite it for both ends. Then we determinate the gravit centre of the candel with help as ruler and fix the metal stick in this point. Warning the stick it will turn out easier to introduce it in the candle.

Si apoyamos los extremos de la varilla en dos mesas podemos ver que la vela queda en equilibrio en posición horizontal.
If we support the end of the stick in two tables, we can see the candle stay in balance in horizontal position.

Si prendemos ahora uno de los extremos de la vela la cera se derretirá y perderá un poco de masa, lo que supondrá, que la vela pierda equilibrio y se incline hacia el otro extremo. Si encendemos el otro extremo se derretirá la cera en ambos lados por lo que el equilibrio se perderá a medida que se derrite la cera ocasionando una oscilación muy grande.
If we light now one of the ends of the candles the wax it will meelt and lose a few mass which it will suppose that the candles loses the balance an two another ends.


Syringe and Balloon (Jeringa y globo)

For our experiment we need a large syringe, a pair of nuts, small balloons and water.
Para realizar nuestro experimento necesitamos una jeringa grande, un par de tuercas, unos globos pequeños y agua.

First we filled the balloon, he tied a pair of nuts and get into the syringe full of water. The nuts allow the balloon afloat
En primer lugar llenamos el globo de aire, le atamos un par de tuercas y lo metemos en la jeringa llena de agua. Las tuercas permiten que el globo no flote.

If we place the plunger of the syringe and pushed a bit we can see that the balloon shrinks. If then up a little globe piston returns to its original size
Si colocamos el émbolo de la jeringa y presionamos un poco podemos ver que el globo reduce su tamaño. Si luego subimos un poco el émbolo el globo recupera su tamaño original.


Portable wave machine / Máquina de ondas portátil

By Ricardo, José Mª and Pablo


Does sugar burn?/¿Arde el azúcar?

By Belén and Ángela


Wednesday, June 23, 2010

Posters


Posters made by Czech pupils to present our project to schoolmates

Posters


Poster made by Czech pupils to present our project to schoolmates

Posters


Poster made by Czech pupils to present our project to schoolmates

Posters


Poster made by Czech pupils to present our project to schoolmates

Posters


Poster made by Czech pupils to present our project to schoolmates

Poster


Poster made by Czech pupils to present our project to schoolmates

Posters


Poster made by Czech pupils to present our project to schoolmates

Posters



Poster made by Czech pupils to present our project to schoolmates

Poster made from Spanish presents


Thank you Spanish friends
Czech team

Tuesday, June 22, 2010

Bloopers (Tomas falsas)

Wave generation machine

Our experiment is called wave generator machine.

The materials we need are:
1-A rubber band about three meters long.
2- Wooden sticks for example barbecue skewers.

Mounting:
1. We introduced the sticks into the rubber band.
2. When the sticks are introduced we put the rubber band and stretch without tension
3. By twisting one of the sticks at the ends of the elastic band, motion is generated and it is transmitted trought out the rubber.

While moving from the its equilibrium position one of the sticks, a disturbance is generated that is transmitted by the elastic band to the neighboring sticks. This perturbation is a traveling wave.
We can see that when the disturbance reaches the other end of the rubber band, then the phenomenon of the wave reflection happens and the wave returns along the same path.


Nuestro experimento se llama máquina de ondas.

Los materiales que necesitamos son:
1. Una goma elástica de tres metros aproximadamente.
2. Palitos de madera por ejemplo palitos de barbacoa.

Montaje:
1. Introducimos los palitos en la goma elástica.
2. Cuando están introducidos los palitos levantamos la goma elástica y estiramos sin que la tensión sea muy grande.
3. Al torcer uno de los palitos de los extremos de la goma elástica se genera un movimiento que se transmite por toda la goma


Al desplazar de su posición de equilibrio uno de los palitos se genera una perturbación que se transmite por la goma elástica a los palitos vecinos. Esa perturbación viajera constituye una onda.
Podemos observar que cuando la perturbación alcanza el otro extremo de la goma elástica se produce el fenómeno de la reflexión y la onda regresa por el mismo camino.



Sunday, June 20, 2010

An eddy in a bottle/ Tourbillon dans une bouteille

An eddy in a bottle

-Materials:
1. Two plastic bottles with water
2. Insulating tape

-Explanation:

One of the bottles has to be empty, and the other bottle must be full a little more than a half. Then you have to make a hole of about one centimetre in the top of each bottle. You put the bottle with water on the table, and you put the bottle without water over the other bottle. Then, you have to join the bottles with insulating tape. When you have assembled the experiment, you can do it.

1º: We have to check that water can't leak out, so it's important to know that it's well locked.
2º: When we turn the bottles, we can see that water can't fall easily between them, so we have to make a circular movement to make the eddy appear inside the bottles, so that the water can fall easier inside the empty bottle.

The explanation of how the water can't fall easily, is because the compressibility of air is locked up in the bottle without water. When you move the bottle with water, the air of both bottles takes contact, due to the water in movement. And it lets the water pass.

Tourbillon dans une bouteille

Matériaux:
1.- deux bouteilles d’eau (à moitié pleine)
2.- Ruban isolant.

Explication:

On vide une bouteille d’eau, et l’autre on la remplie à moitié. On fait a chaque bouchon un trou d’un centimètre plus ou moins. On posse la bouteille plein d’eau sur une table, et l’autre, vide, on la met au contraire, bouchon avec bouchon collées avec un ruban isolant. Une fois unis, commence l’expérience :

1º Nous devions nous assurer que l’eau ne sort pas aucune part, il faut s’assurer qu’elles sont bien fermés.
2º On peut vérifier que l’eau ne passé pas facilement par le trou, on doit sacuer les deux bouteilles en circule pour que le tourbillon commence dans la bouteille et l’eau coule à la bouteille qui reste vide
3º On doit laisser travailler le tourbillon et qu’elle vide la bouteille pleine

L’explication: l’air compris d’ans les bouteilles ne laissent pas de l’espace pour que l’eau coule. Quand la bouteille supérieure bouge, par le mouvement de l’eau, l’air des deux bouteilles entrent en contact et elles empêchent de passer l’eau.


Wednesday, June 16, 2010

Ballons' Race (Course de Ballons.)

Our experiment is called Ballons' Race.
To make our experiments we need:
- a balloon
- insulating tape
- thread
- a straw

1. We cut several meters of thread.
2. Then, we cross the thread from the straw and we tie the extremes of the thread so it gets horizontal position.
3. Afterwards, we blow up the balloon an stick it to the straw, using insulating tape
4. We let the balloon go off the hand allowing the air to escape

Explanation:
The Law of Reciprocal Actions explains the balloon´s movement. The air tath escapes from the balloon with great speed pushes the balloon in the opposite direction.


Notre expérience s'appelle Course de Ballons.
Pour faire cette expériences nous avons besoin de:
- un ballon
- gaine isolante
- une bobine
- une paille

1. On coupe un morceau de fil de plusiers mètres.
2. On passe le fil par l'intérieur de la paille et on lie bouts pour que la paille reste horizontale.
3. On remplit le ballon et on le colle à la paille zvec la gaine isolante.
4. On lâche le ballon, comme ça l'air sort.

Explication:
Le principe d'action-réaction explique le movement du ballon. L'air qui sort du ballon avec une grande vitesse pousse le ballon vers le sens opposé.


Tantalus´s glass (El vaso de Tántalo)

Este experimento se llama el vaso de Tántalo

Los materiales que nosotros necesitamos para hacer este experimento son: un vaso de plástico, un tubo de goma, agua, un recipiente y un poco de pegamento.

Se hace un pequeño agujero en el vaso de plástico y hacemos pasar el tubo de goma por el agujero usando pegamento para fijarlo.

Se dobla el tubo en el interior de manera que forma 2 ramas una corta en el interior y otra larga en el exterior.

Podemos comprobar que el agua no sale del vaso hasta que el nivel de agua no supera el tubo de goma, esto se debe a que el vaso de Tántalo es un sifón.

Cuando el agua llega a la parte superior del tubo de goma comienza a caer por la rama larga arrastrando el líquido que hay dentro del tubo de goma.

This experiment is called Tantalus´s glass

The materials that we need to make this experiment are a plastic cup, a rubber tube, water, a container and some glue.

We make a little hole in the plastic cup and we pass the rubber tube through the hole. We use some glue to fix the rubber tube in the plastic cup.

It is bent inside the tube so that it forms two branches: a short branch on the inside and another long branch outside the plastic cup.

We can check that the water doesn’t come out of the plastic cup, until the water’s level doesn’t overcome the rubber tube, because the Tantalus´s glass is a siphon.

When the water reaches the top of the rubber tube, it begins to bend on the long branch dragging the liquid that is inside the rubber tube.



Saturday, June 12, 2010

A Candle

Experiment from Amanda, Nikola & Martyna

To our experiment we need a candle, a funnel and match.
When you blow next to a candle flame you create a stream of air. The air pressure outside the stream is bigger than the pressure inside. The pressure difference causes movement of the outer layers towards the interior of the air stream. Candle flame bends indicating the direction of the created air movement.

video

Sunday, June 6, 2010

Thanks Czech Republic

We have already received a second package from the Czech Republic.

Thanks for the sweets and candies.


video

Tuesday, June 1, 2010

Coke and mentos

We are going to make an experiment.It Coke and Mentos.
To make our experiment we are going to need: diet coke, salt, sugar, a glass and mentos.

In first place, we fill half of a glass with diet coke and then drop a few Mentos.
We can see that the coke´s fizz goes out.

If we repeat the same experiment with salt, sugar or sand, we´ll get the same results.

Explanation:
Diet Coke contains carbon dioxide fizz.
The chew of mentos help to separate the carbon dioxide molecules vof the Coke. Proper size bubbles are needed to get the fizz goes out