Subiectele astea ar trebui atinse doar de oamenii // Daca un proton este accelerat la o tensiune de mii de miliarde de volti, capata o energie uriasa. Daca am avea milioane de asemenea particule adunate intr-o zona relativ restransa, am putea vorbi despre temperatura ansamblului, care ar fi intr-adevar uriasa. Insa in acceleratoarele cele mai moderne, aceste particule se deplaseaza cu viteze foarte apropiate de a luminii si nu pot fi concentrate in aceeasi regiune din spatiu. In consecinta este incorect sa vorbesti despre temperatura obtinuta in laborator; iar apoi sa spui ca protonii s-ar putea "topi" este o mare bazaconie. Cu atat mai mult sa spui ca "explozia" unui atom poate fi fierbinte. As recomanda autorului sa scrie despre lucruri la care se pricepe macar la un nivel elementar.

Corect // E nevoie de o anumita densitate de particule sa vorebsti de temperatura; nici macar in gazele rarefiate nu poti vorbi de temperatura propriu-zisa si s-o compari cu temperatura in mediul ambiant, dar la cativa ioni?

lucrez in domeniu (proiectez acceleratoare) // Ba se poate sa concentrezi miliarde de particule intr-un spatiu de cativa mm cubi asa cum se intampla zi de zi la CERN (LHC). Chestia cu temperatura tine de conventia de converti energia in temperatura si invers. Ideea nu e de a topi ceva din cauza temperaturii (exprimare gresita) ci de a ciocni particulele cu energii mai mari decat energiile lor interioare; adica de a elibera o parte din constituenti, sub orice forma ar fi ei (energetica sau materiala). Pentru asta s-a dat premiul Nobel in 2004 si se cheama libertate asimptotica. Zona de experimente ALICE e gandita sa analizeze "supa de cuarci si gluoni". Pentru Mihai: Omul stiintific trebuie sa faca totul pentru a cunoaste Universul. Asa e el! Pentru alte forme de cunoastere avem literatura, filosofia, psihologia etc. Nu amestecati borcanele :)

Stirea e preluata, // nu inventia lui proprie. Nu trebuie sa se priceapa decat la limba engleza si folosit calculatorul.

poate asa intelegeti mai bine... // The temperature achieved is hot enough to break matter down into the kind of soup that existed microseconds after the Big Bang or birth of the universe. They used a giant atom smasher at the Department of Energy's Brookhaven National Laboratory in New York to knock gold ions together to make the ultra-hot explosions – which lasted only for milliseconds. But that will provide enough information to keep physicists busy for years in a study that they hope will help them understand why and how the universe formed. "That temperature is hot enough to melt protons and neutrons," Professor Steven Vigdor said at a meeting of the American Physical Society in Washington on Monday. He was referring to the particles that make up atoms and are themselves made up of smaller components called quarks and gluons. What the physicists are looking for are tiny irregularities that can explain why matter emerged out of the primeval hot soup. They also hope to use their findings for more practical applications – such as in the field of "spintronics", a super hi-tech science that aims to make smaller, faster and more powerful computing devices. They used the Relativistic Heavy Ion Collider (RHIC, pronounced "rick"), a particle accelerator and collider that is 2.4 mile (3.8km) around and buried 12 feet (4 metres) underground in Upton, New York to collide gold ions billions of times. "RHIC was designed to create matter at temperatures first encountered in the early universe," Vigdor said. They calculate the four trillion degree temperature gets pretty close. "The predicted melting temperature of protons and neutrons is 2 trillion degrees," said Professor Vigdor"The temperatures at the core of a typical type-2 supernova is 2 billion degrees." In contrast the centre of our sun is 50 million degrees, iron melts at 1,800 degrees and the average temperature of the universe is now 0.7 of a degree above absolute zero (-272C). Prof Vigdor's team believe they are looking at a recreation of

Deocamdata // Am sa ma multumesc cu o supa de pui clasica :)