Register to reply 
How many conservation laws ? 
Share this thread: 
#1
May811, 02:10 AM

P: 55

Hi
How many conservation laws are there ? 1. Conservation of energy 2. " " momentum 3. " mass 4. " charge ???? TIA 


#2
May811, 02:42 AM

P: 757

energy
momentum angular momentum charge gravity + others I can't think of right now mass conservation isn't really true 


#3
May811, 03:18 AM

HW Helper
P: 6,187

color charge
weak isospin probability density CPT symmetry (combining charge, parity and time conjugation) Lorentz symmetry (ripped from http://en.wikipedia.org/wiki/Conservation_law) 


#4
May811, 08:01 AM

Mentor
P: 11,501

How many conservation laws ?



#5
May811, 09:39 AM

Mentor
P: 16,116

I don't know what "conservation of gravity" even means. As for weak isospin, it is certainly not conserved, although it's third component is.
There is no answer to this question. What is conserved and what is not depends on the state you are looking at: an object in a central force orbit always has angular momentum conserved, but in a 1/r potential, it also has another quantity conserved: the RungeLenz vector. Additionally, if x and y are conserved, x + ay is conserved as well, for all values of a. So if there are two, there are an infinite number. 


#6
May811, 09:47 AM

Mentor
P: 11,501

I think the OP was simply asking about the "Conservation Laws".
From wikipedia, it lists a few things seperated into "exact laws" and "approximate laws". 


#7
May811, 02:03 PM

P: 1,281




#9
May911, 02:05 AM

P: 15

The concept of mass–energy equivalence connects the concepts of conservation of mass and conservation of energy, which continue to hold separately. The theory of relativity allows particles which have rest mass to be converted to other forms of mass which require motion, such as kinetic energy, heat, or light.From WkiPedia.



Register to reply 
Related Discussions  
Conservation Laws  Classical Physics  13  
Conservation Laws  Special & General Relativity  13  
Conservation Laws  Advanced Physics Homework  2  
Conservation Laws  General Physics  1  
I need help with Conservation Laws!  Introductory Physics Homework  1 