Mass–energy equivalence

  • B
  • Thread starter Robin04
  • Start date
  • #1
259
16
Does the mass-energy equivalence mean that if we heat a body then its mass will increase?
 

Answers and Replies

  • #2
CWatters
Science Advisor
Homework Helper
Gold Member
10,532
2,298
Yes. Google will find an explanation.
 
  • Like
Likes Robin04
  • #3
CWatters
Science Advisor
Homework Helper
Gold Member
10,532
2,298
I should add it's a very small effect. E=mc^2 so m=E/c^2 and c is big.
 
  • #4
259
16
So this means that the mass is not only dependent on the quantity of matter in that object, right?
 
  • #5
663
491
Well, I think it's hard to strictly and generally define what "quantity of matter" is. I would say that is a good non-relativistic heuristic about what mass is. In relativistic physics mass is defined by [tex]m=\frac{1}{c^2}\sqrt{E^2-p^2c^2}[/tex]
E and p are of course frame-dependent, but it turns out that m is not, so it is a good and non-problematic generalisation of Newtonian mass. Contrary to what is known as "relativisitc mass"...
 

Related Threads on Mass–energy equivalence

  • Last Post
Replies
14
Views
3K
  • Last Post
Replies
10
Views
2K
  • Last Post
Replies
5
Views
3K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
7
Views
5K
  • Last Post
Replies
12
Views
3K
Replies
1
Views
2K
Replies
18
Views
2K
Replies
4
Views
3K
Top