what is absolute zero and why has it never been acheived? also..what are your thoughts about string theory?

Answer 1

Absolute zero is the point on the thermodynamic (absolute) temperature scale where all kinetic motion in the particles comprising matter ceases and they are at complete rest in the “classic” (non-quantum mechanical) sense. At absolute zero, matter contains no heat energy. By international agreement, absolute zero is a temperature of precisely −273.15 °C (−459.67 °F). Throughout the scientific world where measurements are made in SI units, thermodynamic temperature is measured in kelvins where absolute zero is 0 K. Many engineering fields in the U.S. measure thermodynamic temperature using the Rankine scale where absolute zero is 0 °R.

Scientists have made great advancements in achieving temperatures ever closer to absolute zero (where matter exhibits odd quantum effects). In 1994 the NIST achieved a record cold temperature of 700 nK (billionths of a kelvin). In 2003, researchers at MIT established a new record of 0.5 nK.

Hope that helped!

Answer 2

Absolute zero is the temperature in which all heat energy (kinetic energy of molecules) ceases. It's very hard to achieve since you can not cool it in a classical manner (i.e. Making the surrounding stuff a little colder and letting the temperatures equalize).
Interesting note: Even at 0 kelvin, the atoms still move because of quantum "jitters", the random fluctuations caused by the Uncertainty Principle. You see, if an atom were completely still, it would have a definite position and momentum (0). That can not happen because of uncertainly principle.

String theory is a plausible explanation of how things work, even with the "extra" dimensions requirement. We just can not conceptualize what that would "look" like. However, it can not be proven right now so it is just a theory. It will only become a set of laws once it can be shown in the laboratory. Because strings are so unimaginably small, this may never happen, though I like to think it will be possible sometime in the future.

Answer 3

Getting to absolute zero is less a matter of cooling something to 0 degrees Kelvin (-273 C or -459.6 F) than it is to designing a way to measure the temperature once you get there. The atoms of all materials at a temperature above 0 K are in incessant
motion. Heat energy is a manifestation of atomic motion -- the greater the motion, the greater the heat. At 0 K. atomic motion is stopped -- atoms no longer vibrate, rotate, or translate (move).

In order to measure temperature, there must be an energy difference between the thermometer and the environment to be sensed. In other words, the thermometer either absorbs energy from or releases energy to the test environment until both the thermometer and the test zone are at the same
temperature. This process is enabled by atomic motions. Absent atomic motion, there is no energy to be transferred and none to be measured.

Answer 4

Absolute zero is the point on the thermodynamic (absolute) temperature scale where all kinetic motion in the particles comprising matter ceases and they are at complete rest in the “classic” (non-quantum mechanical) sense. At absolute zero, matter contains no heat energy. By international agreement, absolute zero is a temperature of precisely −273.15 °C (−459.67 °F). Throughout the scientific world where measurements are made in SI units, thermodynamic temperature is measured in kelvins where absolute zero is 0 K. Many engineering fields in the U.S. measure thermodynamic temperature using the Rankine scale where absolute zero is 0 °R.

Scientists have made great advancements in achieving temperatures ever closer to absolute zero (where matter exhibits odd quantum effects). In 1994 the NIST achieved a record cold temperature of 700 nK (billionths of a kelvin). In 2003, researchers at MIT established a new record of 0.5 nK.

Absolute zero is only possible in theory. Since it is a complete absence of heat, and there will always be some degree of heat that can never be removed

Answer 5

Absolute zero is the temperature where all atomic motion stops. In order to make something colder.. you need to take away it's heat by putting it with something even colder... or, in the case of a gas, you could compress it, take away the extra heat.. then let it decompress to become colder... but there is nothing colder than absolute zero to take away the heat. Everything is warmer than that so when you put them together..instead of taking away heat it will add it.... if you have a gas at near absolute zero.. and you compress it.. there is not much extra motion in it.. or not much extra heat to begin with... so when it decompresses it cannot cool off very much.

String theory.. ok.. not much there..

but the idea is that everything is made of strings... all matter... strings are the fundamental building blocks that make up protons, neutrons, electrons... there are several different "flavors" of strings... some of them stretch out and back, some of them are shaped like rubber bands... circular.. or undulating in and out...

some strings are like a broken rubber band.. they can attach at one end or both..

some strings are like a broken rubber band that can stretch length and contract again.

I forget what else I knew

Answer 6

2-2=0 That's the absolute truth. Absolute zero has finally been reached.
Congratulate me and give me ten points.

My thoughts about string theory.
Huh? String has a theory?

Answer 7

You can't achieve absolute zero because if you interact with matter, it can't stay in the same state. So if the matter is very close to absolute zero, then anything you try to do with it may heat it up.

Answer 8

Absolute zero is when all particles stop moving. There is no heat energy.

I have no thoughts on string theory.

Answer 9

i imagine that physics as we "understand" them on earth is in uncomplicated phrases one set of many. through watching area we were shown incorrect on many events. Too many people anticipate technology has religious motives. I learn physics and formulate theories for one objective. That people would some day holiday through the celebrities. that's MY dream. you've a properly to disagree.

Answer 10

Nothing cannot exist.

My only opinion about string theory is related to G strings.