Apparent Perpetual Motion Machines
Even though they fully respect the laws of thermodynamics, there are a few conceptual or real devices that appear to be in "perpetual motion." Closer analysis reveals that they actually "consume" some sort of natural resource or latent energy, such as the phase changes of water or other fluids or small natural temperature gradients. In general, extracting large amounts of work using these devices is difficult to impossible.
Read more about this topic: Perpetual Motion
Famous quotes containing the words apparent, perpetual, motion and/or machines:
“It’s apparent that we can’t proceed any further without a name for this institutionalized garrulousness, this psychological patter, this need to catalogue the ego’s condition. Let’s call it psychobabble, this spirit which now tyrannizes conversation in the seventies.”
—Richard Dean Rosen (b. 1949)
“Continual success in obtaining those things which a man from time to time desireth, that is to say, continual prospering, is that men call FELICITY; I mean Felicity of this life. For there is no such thing as perpetual Tranquillity of mind, while we live here; because Life it self is but Motion, and can never be without Desire, nor without Faeroe, no more than without Sense.”
—Thomas Hobbes (1579–1688)
“Motion or change, and identity or rest, are the first and second secrets of nature: Motion and Rest. The whole code of her laws may be written on the thumbnail, or the signet of a ring.”
—Ralph Waldo Emerson (1803–1882)
“The machines that are first invented to perform any particular movement are always the most complex, and succeeding artists generally discover that, with fewer wheels, with fewer principles of motion, than had originally been employed, the same effects may be more easily produced. The first systems, in the same manner, are always the most complex.”
—Adam Smith (1723–1790)