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Can kinetic energy be quantised?

 
 
cheeser
 
Reply Mon 12 Nov, 2012 05:25 am
Well i know certain types of energy can like light and what ever, but can something like kinetic energy be quantised.
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Type: Question • Score: 4 • Views: 711 • Replies: 12
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farmerman
 
  1  
Reply Mon 12 Nov, 2012 10:03 am
@cheeser,
sure, thats how things are designed
0 Replies
 
contrex
 
  1  
Reply Mon 12 Nov, 2012 11:48 am
Kinetic energy is not quantized.
farmerman
 
  1  
Reply Mon 12 Nov, 2012 03:22 pm
@contrex,
bullshit. Youre reading and believing Wikipedi too much. We quantize angular momentum, linear accel, HP etc etc all the time. AS I SAID , thats a way we deign stuff that goes around and around an changes energy states to do work
raprap
 
  1  
Reply Mon 12 Nov, 2012 03:35 pm
@cheeser,
I always thought the word was ‘quantified’ but sure! If it’s moving on a macroscopic level KE is quantifiable.

On a quantum level you’ll eventually face Schrödinger’s cat--but even that's predictable.


Rap
0 Replies
 
farmerman
 
  1  
Reply Mon 12 Nov, 2012 05:56 pm
@farmerman,
brits say everything funny. Quantified or even Quantitated is like Quantized. where we say Oriented, they say orientated.

So we both waste precious letters sometimes
raprap
 
  1  
Reply Mon 12 Nov, 2012 09:44 pm
@farmerman,
Separated by a common language.
0 Replies
 
cheeser
 
  1  
Reply Tue 13 Nov, 2012 11:02 am
@farmerman,
In my defence i did look it up before typing (i had been using the word and wasnt totally sure i had been using it corretly). But back to to topic, it can be be expressed exactly in terns of an indivisible unit then?
raprap
 
  1  
Reply Tue 13 Nov, 2012 11:32 am
@cheeser,
In terms of energy, yes!!

The Basic (SI) unit for energy is the Joule (J)--. Other common terms for energy are Calorie, erg, ft-lbf, watt hour, horsepower hour, BTU, kilotons of TNT, electron volt.

Rap
DrewDad
 
  1  
Reply Tue 13 Nov, 2012 11:42 am
@raprap,
You can have .4 Joules, though. Joules are not indivisible.

Kinetic energy is quantifiable, but it is not quantized (composed of discrete quanta).
contrex
 
  1  
Reply Tue 13 Nov, 2012 11:48 am
@DrewDad,
DrewDad wrote:
Kinetic energy is quantifiable, but it is not quantized (composed of discrete quanta).


Which is what I took the questioner to mean, and which is the correct answer.
cheeser
 
  1  
Reply Tue 13 Nov, 2012 04:58 pm
@contrex,
That's exactly what I did mean, so it isn't composed of quanta.
0 Replies
 
raprap
 
  1  
Reply Tue 13 Nov, 2012 05:02 pm
@DrewDad,
??

Convert a Joule to an electron volt (they're both units of energ). A quanta of energy is a small fraction of an eV by Plank's relation (E=h*nu). On a macrosopic level, say anything involving more than the mass of an hydrogen nucleus, energy is effectively continuous.

Rap
0 Replies
 
 

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