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→Some questions: 3 more replies
And by the way, as has been pointed out, if you deny special relativity, you have to reject Maxwell's equations. Are they a liberal conspiracy as well? --[[User:AndyFrankinson|AndyFrankinson]] 20:34, 5 April 2012 (EDT)
And by the way, as has been pointed out, if you deny special relativity, you have to reject Maxwell's equations. Are they a liberal conspiracy as well? --[[User:AndyFrankinson|AndyFrankinson]] 20:34, 5 April 2012 (EDT)
:"Usually when we speak of an object's mass we do not distinguish whether we are referring to its inertial mass or its gravitational mass. This is because the quantity of matter present in an object, i.e., its mass, does not depend on the method by which it is measured." [http://dev.physicslab.org/Document.aspx?doctype=3&filename=Dynamics_InertialGravitationalMass.xml] Indeed, no measurement has ever detected a difference between the two.
:"Usually when we speak of an object's mass we do not distinguish whether we are referring to its inertial mass or its gravitational mass. This is because the quantity of matter present in an object, i.e., its mass, does not depend on the method by which it is measured." [http://dev.physicslab.org/Document.aspx?doctype=3&filename=Dynamics_InertialGravitationalMass%25252Exml] Indeed, no measurement has ever detected a difference between the two.
:As to your second point, chemical reactions can cause energy to be released, and the remaining mass to be reduced. This is hardly astounding and certainly does not imply that E=mc<sup>2</sup>.
:As to your second point, chemical reactions can cause energy to be released, and the remaining mass to be reduced. This is hardly astounding and certainly does not imply that E=mc<sup>2</sup>.
:Your third point is often repeated by Relativists but overlooks that Maxwell's equations were developed and demonstrated decades before the [[Theory of Relativity]]. Maxwell's equations survived just fine for years without anyone claiming that somehow E=mc<sup>2</sup>. Indeed, an assertion that people "have to reject Maxwell's equations" based on relativity suggests a mathematical approach to physics, rather than an observational one. Are you aware of how Eddington claimed that a physical constant "must" have a certain value due to some mathematical rationale? (He was wrong, of course.)--[[User:Aschlafly|Andy Schlafly]] 21:06, 5 April 2012 (EDT)
:Your third point is often repeated by Relativists but overlooks that Maxwell's equations were developed and demonstrated decades before the [[Theory of Relativity]]. Maxwell's equations survived just fine for years without anyone claiming that somehow E=mc<sup>2</sup>. Indeed, an assertion that people "have to reject Maxwell's equations" based on relativity suggests a mathematical approach to physics, rather than an observational one. Are you aware of how Eddington claimed that a physical constant "must" have a certain value due to some mathematical rationale? (He was wrong, of course.)--[[User:Aschlafly|Andy Schlafly]] 21:06, 5 April 2012 (EDT)
::Your first point: It's good that we all agree that inertial mass and gravitational mass are the same thing. (This is the fundamental hypothesis of general relativity, by the way.) But the term "mass" always means "inertial mass". Gravity never appears anywhere in special relativity. Even if Newton's constant of universal gravitation ("G") were zero, that is, we lived in a hypothetical universe in which there is no gravity, special relativity, the Lorentz transform, and E=mc^2 would still be true. There should be no mention of gravity anywhere in the article. But the second sentence of the article refers to "mass (i.e., gravity)". Please take that out. I would do it myself, but I'd get it wrong, since I don't know what point you were trying to make.
::Your second point: That chemical reactions that cause energy to be released result in a reduction of the final mass most certainly '''''is''''' astounding. No one had ever seen this, or suspected it, before E=mc^2, and it is doubtful that anyone has seen it to this day, since the effect is so small for chemical reactions. The phenomenon is known only because we know that E=mc^2 is true.
::Your third point: Yes, Maxwell's equations were developed decades before relativity, and survived just fine before anyone suspected that E=mc^2. Your claimed "assertion that people 'have to reject Maxwell's equations' based on relativity" is not made by anyone. It's the ''denial'' of relativity that would necessitate a denial of Maxwell's equations. Maxwell's equations imply relativity, though Maxwell didn't realize it. In fact, it was an analysis of Maxwell's equations, not the Michelson-Morley experiment, that led to relativity. If we lived in a hypothetical universe in which there were no electric or magnetic forces, relativity would still be true.
[[User:JudyJ|JudyJ]] 23:36, 5 April 2012 (EDT)