Whoever answers all questions on my quiz correctly first gets BEST ANSWER!?

Question

No, I'm not taking a test for school or anything, I just made this quiz myself and I want to see how much the average person knows about it.

ABSOLUTE ZERO QUIZ
1. Why is it impossible for physicists to reach absolute zero?
2. What temperature scale do physicists use to refer to low temperatures?
3. How close to absolute zero can physicists get?
4. What tool do physicists use to cool atoms so close to absolute zero?
5. What is Bose-Einstein condensation?
6. What is a superconductor?

Remember: The first person to get all questions correct gets Best Answer!

moral Lu, all of my friends could do all of these straight from their heads. They're not hard or time-consuming at all. You just aren't nerdy enough to know the answers.

Answer 1

1. An ideal gas would occupy no room at absolute zero
2. Kelvin
3. A few billionth of a degree above absolute zero
4. Laser cooling, or bouncing photons off atoms
5. A process of cooling bosons to a temperature very near absolute zero where they collapse into the lowest quantum state and quantum effects become evident at macroscopic scale
6. A metal cooled to near absolute zero so much that its electrical resistance virtually disappears

Answer 2

1) One explanation is because at absolute zero there would be no motion, but according to quantum theory all particles are constantly moving. I don't know if there are others or not.

2) The Kelvin and Rankine scales. Kelvins (NOT degrees Kelvin) are the same size as degrees Celcius, but the zero-point is absolute zero instead of the freezing point of water. A degree Rankine, similarly, is the same size as a degree Fahrenheit, but with absolute zero as the zero-point.

3) According to Wikipedia, they've gotten within 450 pK, or 4.5 * 10^-10 K of absolute zero. It also says that it's possible to get arbitrarily close, so I assume it's just the added expense of going further that prevented them.

4) They're called cryocoolers.

5) Again according to Wikipedia, when atoms get so cold that they're in the lowest possible quantum energy state, they can't lose any more energy by any means at all, even friction, so you get a fluid that flows really easily.

6) A superconductor is a substance that has no resistance to electricity at all. Resistance rises with temperature and the first superconductors discovered only worked within a few degrees of absolute zero. They have ones now that work in conditions as hot as -70 C.

Answer 3

1. Because of the laws of thermodynamics, absolute zero would be when particles stop moving. This is contradictory to the laws as it says that entropy cannot be zero. Also it is impossible to do this artificially.
2. Kelvin, 0 kelvin is absolute zero.
3. .000000000001 K,
4. Nuclear Magnetic Ordering
5. A Bose–Einstein condensate is a state of matter formed by bosons cooled to temperatures very near to absolute zero (0 kelvin or -273.15°C)
6. Superconductivity is a phenomenon occurring in certain materials at extremely low temperatures, characterized by exactly zero electrical resistance and the exclusion of the interior magnetic field (the Meissner effect).

Answer 4

Bose–Einstein condensate


1. Why is it impossible for physicists to reach absolute zero?
see Bose–Einstein condensate
http://en.wikipedia.org/wiki/Bose-Einstein_condensate


2. What temperature scale do physicists use to refer to low temperatures?
Mostly Kelvin (-273.15°C) or die hards use really Rankine (–459.67 °F)

3. How close to absolute zero can physicists get?
4E-10 K
In September 2003, MIT announced a record cold temperature of 450 pK, or 4.5 E-10 K in a Bose-Einstein condensate of sodium atoms. This was performed by Wolfgang Ketterle and colleagues at MIT.


4. What tool do physicists use to cool atoms so close to absolute zero?
Liquid Helium :) see http://prola.aps.org/abstract/PRL/v91/i25/e250401

5. What is Bose-Einstein condensation?
No not condensation but condensate
A Bose–Einstein condensate is a state of matter formed by bosons cooled to temperatures very near to absolute zero (0 kelvin or -273.15°C). Under such supercooled conditions, a large fraction of the atoms collapse into the lowest quantum state, at which point quantum effects become apparent on a macroscopic scale. http://en.wikipedia.org/wiki/Bose-Einstein_condensate

6. What is a superconductor?
One conductor for a whole train ;)

The one which resistance is very low in comparison to conductors http://en.wikipedia.org/wiki/Superconductor

Answer 5

What is Bose-Einstein condensation?

It is phase transition of type II, which occurs when
ideal gas of non-interacting bosons is either
compressed or cooled. The trick is that in classical
statistical mechanics phase transitions in gas of non-interacting particles are impossible. But in quantum
statistical mechanics even non-interacting particles
do interact via 'exchange of identities'.

Answer 6

a million. Bach 2. lots have been pronounced in Latin, because of the fact it grew to become right into a Catholic ingredient to do, to maintain the ineffective language going 3. that's a query in Latin for "the place are you going?". the place is it?= anyplace you're going... 4. Leonardo Da Vinci 5. bill Gates 6. Latin for "mom of God" 7. The viola is larger, scale length is diverse. 8. that's from the e book, "Rose in bloom" by potential of Louisa could Alcott 9. To donate money, time, possesions and attempt to assist a socially sturdy reason (helpful) 10. a number of it i knew... 3, 6 and eight had to look up!!! :D

Answer 7

All that for 10 points, where am I school????