Register to reply

Rest mass of Hydrogen

by big_bounce
Tags: hydrogen, mass, rest
Share this thread:
Vanadium 50
#19
Feb9-13, 04:13 PM
Emeritus
Sci Advisor
PF Gold
Vanadium 50's Avatar
P: 16,450
Quote Quote by big_bounce View Post
when two quantities are related only by a constant multiple we say they are different ways of looking at the same thing.
That's simply not correct. If I have a 100Ω resistor, and measure its current and the volatge across it, they are related by a constant, but current and voltage are not the same thing.

Let me repeat:

Quote Quote by Vanadium 50 View Post
Big Bounce, we really discourage learning by the technique of posting a parade of incorrect statements, hoping they will be corrected by others. It's inefficient, and it tends to make other people cross.
big_bounce
#20
Feb10-13, 06:08 AM
P: 83
Quote Quote by Drakkith View Post
Then please provide some reference stating that energy and mass are the same thing. And not only that, but justifies it too.
The equation e=mc^2 justifies it .
Einstein's most famous equation is E=mc^2. It means that energy and mass are different forms of the same thing.

http://simple.wikipedia.org/wiki/Albert_Einstein

Another reason :

Matter and Antimatter annihilation is an example of converting energy in one form (electrons and positrons) into another (high-energy photons) .
Or A photon it's a packet of energy can pair-produce to make an electron and a positron too .



The mass-energy equivalence equation is NOT a definition of either mass or energy. It is a mathematical way of relating the amount of mass associated with an amount of energy, and the amount of energy associated with an amount of mass
No we can say it's a definition
The language of physics is mathematics Think of what Work is . Work is when a force causes displacement of a body . we can translate this definition to mathematics with the equation w=fd

Also, the equation is missing the rest of it anyways. The full version includes momentum as well. It is E2 = m2c4+p2c2.
What does this about momentum now? Is it too also energy? No. It is not.
No we can say momentum and energy are same thing too , think about photons
Photons are packets of energy

Your equation is
E2 = m2c4+p2c2.

For a photon the rest mass term vanishes, and you get E=pc.
So energy and Momentum are related by a constant ( related by the invariant speed of light).

See the Pythagorean relationship between Energy (E), Mass (m) and Momentum (p) .

You are correct in that knowing either the frequency of the EM wave or the energy of the photon you can find the other, but this in no way means energy and frequency are the same things.
No they are same thing because frequency of photon can do work . if frequency be higher photon can do work more .


Quote Quote by Vanadium 50 View Post
That's simply not correct. If I have a 100Ω resistor, and measure its current and the volatge across it, they are related by a constant, but current and voltage are not the same thing.
No that's not true . in equation RI=V resistor is not a constant voltage and current can be a constant too ,
for example : I have a 100 amperes , and measure its resistor and the voltage across it
Is that mean R and V are same thing ? no .
But in equation e=mc^2 we just have a constant and it's speed of light .
Hope you understand .
ZapperZ
#21
Feb10-13, 06:24 AM
Emeritus
Sci Advisor
PF Gold
ZapperZ's Avatar
P: 29,241
So, when you created this thread, were you asking a question to learn, or was your intention to enlighten people on what you think you know?

Zz.
Drakkith
#22
Feb10-13, 09:33 AM
Mentor
Drakkith's Avatar
P: 11,990
Sorry Big Bounce, but you are quite simply, wrong. It's clear that you do not wish to learn anything, but to argue, therefore I will leave this thread now. Have a nice day.
Naty1
#23
Feb10-13, 02:06 PM
P: 5,632
Binding energy is the mechanical energy required to disassemble a whole into separate parts. A bound system typically has a lower potential energy than the sum of its constituent parts this is what keeps the system together......In general, binding energy represents the mechanical work which must be done against the forces which hold an object together, disassembling the object into component parts separated by sufficient distance that further separation requires negligible additional work.
At the atomic level the atomic binding energy of the atom derives from electromagnetic interaction and is the energy required to disassemble an atom into free electrons and a nucleus.
http://en.wikipedia.org/wiki/Binding_energy


Register to reply

Related Discussions
Do gravitational fields depend on relativistic mass, or just rest mass? Special & General Relativity 5
Determining relativistic velocity from work done from rest with a given rest mass Special & General Relativity 8
Is there a quanta of rest mass? say multiples of electron mass? High Energy, Nuclear, Particle Physics 20
Is there a quanta of rest mass? say multiples of electron mass? Beyond the Standard Model 1
Rest mass/relativistic mass question General Physics 8