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:
“Sometimes apparent resemblances of character will bring two men together and for a certain time unite them. But their mistake gradually becomes evident, and they are astonished to find themselves not only far apart, but even repelled, in some sort, at all their points of contact.”
—Sébastien-Roch Nicolas De Chamfort (1741–1794)
“Admiration is a very short-lived passion that immediately decays upon growing familiar with its object, unless it be still fed with fresh discoveries, and kept alive by a new perpetual succession of miracles rising up to its view.”
—Joseph Addison (1672–1719)
“... The festival-colored brightness
That is their motion ...”
—Gwendolyn Brooks (b. 1917)
“Shoes are the first adult machines we are given to master.”
—Nicholson Baker (b. 1957)