2007-03-07 13:44:13 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Physics
friction..gravity.. all them forces in the world that affect everything they come into contact with........
2007-03-07 13:48:37 · answer #1 · answered by Anonymous · 0⤊ 0⤋
are you asking from a practical or theoretical point of view? Theoretically it can have an ideal efficiency of 100%, but it would have to be frictionless. Energy is neither created nor destroyed, only transformed. So, to have an ideal efficiency, it would have to be frictionless as friction is a form of energy (or negative energy).
2007-03-07 21:50:06 · answer #2 · answered by Scarp 3 · 0⤊ 0⤋
Because there is ALWAYS energy/ work lost to the environment. Commonly in the form of heat through friction. It is impossible prevent heat being transmitted off into the air/ surrounding environment.
2007-03-07 21:50:47 · answer #3 · answered by Linnea L 3 · 0⤊ 0⤋
Thermodynamics, you should have read that by now.. Also, what I think you are referring to is a perpetual motion machine. Read the first and second, they'll really clear you out.
2007-03-07 22:12:10 · answer #4 · answered by Nescio sed Scio 2 · 0⤊ 0⤋
because there is no such thing as perfect. just like humans machines wear out over time.
2007-03-07 21:52:40 · answer #5 · answered by lucifer d 3 · 0⤊ 0⤋
nothing's perfect, its just the imperfections of all matter in the universe. IF one examines closely that is due to the "randomness" of matter in its smallest forms.
2007-03-07 21:52:36 · answer #6 · answered by thereytrain 2 · 0⤊ 0⤋
this amazing thing called friction
2007-03-07 21:48:00 · answer #7 · answered by x1yofuzzy1x 4 · 0⤊ 0⤋