Hi all, I thought I would start a thread for the debate of Terms and Definitions of
things. I think if we can refer to a written definition and say this is what we are
intending to mean when we say something there will be less misunderstandings.
It really doesn't matter if there are more than one meaning for a term as long as
the intended meaning is stated or clearly implied by the context in which it is used.
I found this definition for energy.
Source:- Energy Definition.
The part in bold (my bold) makes no sense to me. How can they claim that
the sound and heat energy remain in the system ? A system must have
boundaries, unless they are referring to the entire universe as a system.
OK so energy is the capacity of a physical system to do work.
From the definition.
Now for that one sentence to make sense the terms "a physical system" and
"to perform work" need to be clearly defined.
What defines a particular "physical system's" boundaries ?
I think it is easy to see that the term "to perform work" means "any work" for
us this includes both useful work and useless work or work we don't want
done but can't avoid, "losses".
However I cannot see how the stored energy from a battery when
transformed into waste sound in a very loud device or the waste heat given
off by an overly inefficient device is retained in the system.
Can anyone explain this.
In my opinion the definition I linked above does not make much sense unless
the Physical system referred to is the entire universe.
So for us we should remember what is useful work and useless work. And we
should consider all our systems to be bounded only by the universe itself.
Therefore anything other than 100 % efficiency is impossible over or under.
There are only real world efficiency's as far as energy is concerned.
Considering the entire Universe as the boundary to all our "Physical Systems"
Overunity is in fact totally impossible. Logically. This is unarguable. An axiom.
Power is a different thing entirely. And efficiency's over 100% can be obtained
when power is used for the measurement of efficiency. Using power to
determine efficiency give a Coefficient of Performance value or C.O.P..
Well that's my opinion.
Cheers
things. I think if we can refer to a written definition and say this is what we are
intending to mean when we say something there will be less misunderstandings.
It really doesn't matter if there are more than one meaning for a term as long as
the intended meaning is stated or clearly implied by the context in which it is used.
I found this definition for energy.
Source:- Energy Definition.
The part in bold (my bold) makes no sense to me. How can they claim that
the sound and heat energy remain in the system ? A system must have
boundaries, unless they are referring to the entire universe as a system.
Definition: Energy is the capacity of a physical system to perform work. Energy exists in several forms such as heat, kinetic or mechanical energy, light, potential energy, electrical, or other forms.
According to the law of conservation of energy, the total energy of a system remains constant, though energy may transform into another form. Two billiard balls colliding, for example, may come to rest, with the resulting energy becoming sound and perhaps a bit of heat at the point of collision.
The SI unit of energy is the joule (J) or newton-meter (N * m). The joule is also the SI unit of work.
According to the law of conservation of energy, the total energy of a system remains constant, though energy may transform into another form. Two billiard balls colliding, for example, may come to rest, with the resulting energy becoming sound and perhaps a bit of heat at the point of collision.
The SI unit of energy is the joule (J) or newton-meter (N * m). The joule is also the SI unit of work.
From the definition.
Energy is the capacity of a physical system to perform work.
"to perform work" need to be clearly defined.
What defines a particular "physical system's" boundaries ?
I think it is easy to see that the term "to perform work" means "any work" for
us this includes both useful work and useless work or work we don't want
done but can't avoid, "losses".
However I cannot see how the stored energy from a battery when
transformed into waste sound in a very loud device or the waste heat given
off by an overly inefficient device is retained in the system.
Can anyone explain this.
In my opinion the definition I linked above does not make much sense unless
the Physical system referred to is the entire universe.
So for us we should remember what is useful work and useless work. And we
should consider all our systems to be bounded only by the universe itself.
Therefore anything other than 100 % efficiency is impossible over or under.
There are only real world efficiency's as far as energy is concerned.
Considering the entire Universe as the boundary to all our "Physical Systems"
Overunity is in fact totally impossible. Logically. This is unarguable. An axiom.
Power is a different thing entirely. And efficiency's over 100% can be obtained
when power is used for the measurement of efficiency. Using power to
determine efficiency give a Coefficient of Performance value or C.O.P..
Well that's my opinion.
Cheers
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