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misogynisticfeminist
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From what i heard, my friend told me relatvistic mass has just been recently proven wrong. Is that right?
misogynisticfeminist said:From what i heard, my friend told me relatvistic mass has just been recently proven wrong. Is that right?
No. Absolultely not. Where did he get that idea from??misogynisticfeminist said:From what i heard, my friend told me relatvistic mass has just been recently proven wrong. Is that right?
misogynisticfeminist said:From what i heard, my friend told me relatvistic mass has just been recently proven wrong. Is that right?
pmb_phy said:Where did he get that idea from??
I'll have to disagree with you on this point. Relativistic mass is defined such that the quantity mv is always conserved in collision (wherein one then defines the product mv as 'momentum'). Had nature been such that this is never measured in the lab then it would follow that the definition is incorrect in that it can't fit into what nature had in mind.Tom Mattson said:On the other hand, there is nothing stopping you from associating [itex]\gamma m_0[/itex] together and defining that product as [itex]m[/itex]. This [itex]m[/itex] is called the relativistic mass, and it is a function of velocity.
So, the only way to disprove relativistic mass is to disprove the associative property of real numbers under multiplication (it can't be done).
Maybe his name is DW.
pmb_phy said:I'll have to disagree with you on this point. Relativistic mass is defined such that the quantity mv is always conserved in collision (wherein one then defines the product mv as 'momentum').
dextercioby said:Tom,since "c" is absolute (and NOT BECAUSE IT IS CONVENTIONALLY TAKEN AS "+1"),one should not speak about RELATIVISTIC MASS,but about ENERGY...
What pat of it are you confused about?dextercioby said:There's no need to introduce RELATIVISTIC MASS (a rather confusing concept,
Relativistic mass is defined differently than energy. Under certain cercumstances one is proportional to the other, I.e. E = -mc^2. It appers to me that you're asserting that the "m" in m = E/c^2 is identical to the "m" in m = p/v. If so then the assertion is incorrect since, in the general, E/c^2 does not equal m = p/v....at least to the unfamiliar with subtleties of SR/GR),when u have already energy...
I was saying that relativistic mass is defined such that mv is a conserved quantity. What you posted implied that the definition cannot be wrong. What I posted was why a definition can be wrong. Its a fine point though and not worth worrying about.Tom Mattson said:I'm not sure I get what you are saying. [itex]E[/itex] and [itex]m[/itex] are only identical in natural units. In the SI system, they have different dimensions.
pmb_phy said:I was saying that relativistic mass is defined such that mv is a conserved quantity. What you posted implied that the definition cannot be wrong. What I posted was why a definition can be wrong. Its a fine point though and not worth worrying about.
Relativistic mass is a concept in physics that describes the apparent increase in mass of an object as its velocity approaches the speed of light. It takes into account the effects of special relativity, which states that the laws of physics are the same for all inertial observers.
This is a debated topic among physicists. Some argue that relativistic mass is a useful concept and is supported by experimental evidence, while others argue that it is an outdated notion and that the concept of mass should remain constant regardless of velocity.
Rest mass, also known as invariant mass, is the mass of an object as measured in its own frame of reference, where it is at rest. Relativistic mass, on the other hand, takes into account the object's velocity and can be seen as an increase in the object's energy as it moves faster.
No, relativistic mass cannot be directly observed or measured. It is a theoretical concept that is used in calculations and equations to describe the behavior of objects moving at high speeds.
Einstein's equation shows the equivalence of mass and energy, and it can be used to calculate the relativistic mass of an object moving at a certain velocity. The equation states that the energy of an object (E) is equal to its mass (m) multiplied by the speed of light squared (c^2).