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E =mc{squared}
How Did He Arrive At This ?
What Was The Guy Thinking When He Cooked Up This Mess .
How Did He Arrive At This ?
What Was The Guy Thinking When He Cooked Up This Mess .
moose said:Don't you think it's kind of a coincidence that the formula is that small, and it just uses our units O.O perfectly, like meters, second, joule, kilograms...
am I missing something here?
SpaceTiger said:Units are a human invention, so their consistency has no physical meaning. The real key thing here is that the physical concept of energy is related to that of mass, things which had been considered separately prior to Einstein.
eNathan said:Does this mean units of the "meter" and "kilogram" were invented to have a relationship too?
SpaceTiger said:Not sure what you mean. The units of meters and kilograms are arbitrary scalings to two different kinds of quantities. Nobody writes an equation with one side having units of meters and the other with units of kilograms. That would imply "inconsistent" units.
Of course it would still work:eNathan said:e=mc^2 where "m" is in pounds, and "c" is in miles per hour, and "e" is still in joules. Would this equation work? no, the units have a relationship. The American Standard Units are terrible
I wouldn't quite say "arbitrary". Unlike the English system, SI was designed specifically to be easy to use. I don't know the specifics of how it was done, but it is very convenient that (for example) water has a mass of 1g/cc and a heat capacity of 1cal/g*C.SpaceTiger said:Not sure what you mean. The units of meters and kilograms are arbitrary scalings to two different kinds of quantities.
Integral said:Why are we getting into unit bashing? It really doesn't make any difference which units are used as long as you are consistent.
Just for the record, Einstein did not just "guess" this relationship. It is a derived result of aplying the Lorentz transforms to the kinematics equations of physics.
DaveC426913 said:When all is washed and dried, does that make a difference?
I was merely pointing out the difference between proportionality and equality.
E=mc^2 is a proportionality.
Or am I completely wrong?
russ_watters said:I wouldn't quite say "arbitrary". Unlike the English system, SI was designed specifically to be easy to use. I don't know the specifics of how it was done, but it is very convenient that (for example) water has a mass of 1g/cc and a heat capacity of 1cal/g*C.
Integral said:Just for the record, Einstein did not just "guess" this relationship. It is a derived result of aplying the Lorentz transforms to the kinematics equations of physics.
whozum said:I remember he rejected a major part of his discoveries, but I don't remember which. He refused to believe, I think that the universe was expanding.
Why is this? Science is absolute is it not? Once you prove something, its proven and should be accepted?
E=mc^{2} is an equation that represents the relationship between energy (E), mass (m), and the speed of light (c). It states that energy is equal to the mass of an object multiplied by the speed of light squared.
The equation E=mc^{2} was first proposed by Albert Einstein in 1905 as part of his theory of special relativity. However, it was later refined and fully understood in the context of his theory of general relativity in 1915.
Einstein arrived at the equation E=mc^{2} by combining the principles of his theory of special relativity, which explains the relationship between space and time, and his theory of mass-energy equivalence, which states that mass and energy are interchangeable.
E=mc^{2} is significant because it revolutionized our understanding of the universe and paved the way for modern physics. It also led to the development of nuclear energy and weapons, as well as the understanding of how stars produce energy through nuclear fusion.
Yes, E=mc^{2} is always true. It is a fundamental principle of physics that has been extensively tested and confirmed through experiments and observations. However, it is important to note that the equation only applies in certain conditions, such as in the absence of external forces and at speeds approaching the speed of light.