Naissance au Kamchatka : le geyser "Prikolny".

<br /> <br /> Bonsoir,<br /> <br /> <br /> le savon est un agent tensio-actif et joue sur la tension superficielle du liquide pour faciliter le passage de la phase liquide à la phase gazeuse.<br /> <br /> <br /> Plus de détails au cours de physique-chimie <br /> <br /> <br /> Une autre explication trouvée sur le web, qui va dans le même sens -( NB. je n'ai pas pu vérifier l'affirmation qu'il existe bien deux chambres sous ce geyser ) : "Our next day in Rotorua starts with an early start and a trip out to Wai-O-Tapu, which is an area of bubbling mud pools, the Lady Knox Geyser, and lakes and<br /> pools of amazing coloured water with brightly coloured mineral deposits in them. We go to see the Lady Knox Geyser first of all as it is scheduled to erupt at 10.15am. This is a manipulated<br /> eruption using a surfuctant (which is a type of soap). The geyser has two water chambers, one lower, hot one and one upper, cold one. The upper chamber cools due to a larger opening to the<br /> outside. The lower one heats up due to the volcanic activity below. When soap is thrown into the upper water chamber, the lowered surface tension of the water allows it to mix with the hotter<br /> water below, causing the eruption." <br /> <br /> <br />  <br /> <br /> <br />  <br /> <br /> <br /> <br />