2007-01-01 08:03:21 · 10 answers · asked by jset1989 2 in Science & Mathematics ➔ Physics
it is impossible to get 100% efficiency. it has to do with energy. energy is not created or destroyed. energy will be lost in some form or another. machines have friction.....no matter how small the amount of friction there is taking place in that machine that is energy being lost. friction causes heat. for the machine to be 100% efficient it would have to lose no enrgy in any form
2007-01-02 11:32:44 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Looks at it this way, if its not less than 100%, only other choices are equal or greater than 100%.
If it is greater than 100%, then there would be an infinite amount of energy created. If that happens, then the world would not exist in its form.
On the other hand, if the process are exactly 100% efficient, than energy is being converted from one form to another without any effort. That is a scary proposition too. All the motion, light, sound, electricity, heat, ect will be changing from one form to another without any external influence. It would be a chaotic world in such a case.
So, the only reason the world is the way it is, is because the processes are less than 100% efficient. No other state is stable.
2007-01-01 08:54:22 · answer #2 · answered by K2 2 · 0⤊ 0⤋
The efficiency is always <100% because there is always be energy that is loosed during transformation. like heat energy sound energy, "a perpetual motion machine is impossible =>no system is perfectly by efficient". So the input energy will always be >Useful energy.
And efficiency = total useful energy over total energy input
2007-01-01 08:36:49 · answer #3 · answered by Fehy Mampiono Rabemahefa 1 · 0⤊ 0⤋
Energy cannot be created nor destroyed and since there is always friction then it cant be more that 100% efficient. If it was say 110% efficient then it would mean that it is creating energy of 10% which is impossible.
2007-01-01 08:17:55 · answer #4 · answered by Olly 2 · 0⤊ 0⤋
Ahhh interesting question.
It is realized by scientists, that nothing in the universe its 100% efficient. Nothing... with only one exception.
It is usually because at least some sort of energy is lost in the process. via friction in your case.
Not even nuclear reactions are 100% efficient.
Nuclear fission is only 8% efficient, and Nuclear Fusion is 13%.
There is, however, only one reaction that can achieve 100% efficiency. And that is antimatter to matter reactions. They completely annhilate each other turning matter into pure energy as it is seen in E=mc^2.
2007-01-01 08:20:51 · answer #5 · answered by sunneyzwang@sbcglobal.net 2 · 0⤊ 0⤋
Thermodynamics. Its actually a complication that goes to the heart of everything we know about the Universe. Thermodynamics had modest beginnings in the industrial revolution but its become so profound that one physicist said that thermodynamics owed more to steam engines than the other way around. I could sum it up with 'disorder will always increase in a closed system' but there's a lot to it.
2007-01-01 08:38:01 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Friction is always a factor in machine efficiency. It can never be reduced to zero.
2007-01-01 08:12:35 · answer #7 · answered by John H 6 · 2⤊ 0⤋
The answer has to do with the Second Law of Thermodynamics, i.e. entropy is always increasing. Every action, whether mechanical or chemical, loses energy in the form of heat. There is no way to avoid this.
2007-01-01 08:08:46 · answer #8 · answered by beenthere 2 · 0⤊ 0⤋
i assume the final try is likewise seventy 5 factors. 4 exams could be 3 hundred pts. For a 77% you decide on an entire of: 77% * 3 hundred = 231 pts. so far you have scored fifty 8 and fifty 9 = 117 factors. so which you purely would desire to attain 114 factors on the final 2 exams. in case you incredibly do score a 0 in this night's try you may opt to attain 114 on the final try (152%). First, I doubt you will get a 0, yet you incredibly could attempt to get something greater advantageous than that throughout the time of this night's try... are you able to speak on your instructor and tell him/her your concerns? between the subsequent 2 exams you may desire to usual 114/a hundred and fifty = seventy six%. So in spite of you score below that this night, you may desire to make up on the final try. to illustrate, in case you have been to attain a sixty two% this night (40 seven factors), you may would desire to attain a ninety% (sixty seven factors) on the final try.
2016-12-11 20:34:01 · answer #9 · answered by ? 4 · 0⤊ 0⤋
Simple answer:
friction
2007-01-01 08:12:32 · answer #10 · answered by Anonymous · 1⤊ 0⤋