The Sydney Morning Herald, 26 May, 1975
Ford Torino Stirling Special
Friday, 24 May 2013
Ford Torino Stirling Special
da
Modello matematico di motore Stirling accoppiato ad un generatore
elettrico lineare, Michele Favaron
elettrico lineare, Michele Favaron
http://tesi.cab.unipd.it/37661/1/Modello_matematico_di_motore_Stirling_accoppiato_ad_un_generatore_lineare.pdf
Motore di Stirling fatto in casa
Su YouTube cercando "motore stirling fatto in casa" trovate diversi progetti per crearvi il vostro "motore".
A liquid telescope
http://en.wikipedia.org/wiki/Liquid_mirror_telescope
Liquid mirror telescopes are telescopes with mirrors made with a reflective liquid. The most common liquid used is mercury. The container for the liquid is rotating so that the liquid assumes a paraboloidal shape. A paraboloidal shape is precisely the shape needed for the primary mirror of a telescope. The rotating liquid assumes the paraboloidal shape regardless of the container's shape. Liquid mirrors can be a low cost alternative to conventional large telescopes. Compared to a solid glass mirror that must be cast, ground, and polished, a rotating liquid metal mirror is much less expensive to manufacture.
"Isaac Newton noted that the free surface of a rotating liquid forms a circular paraboloid and can therefore be used as a telescope, but he could not actually build one because he had no way to stabilize the speed of rotation[citation needed] (the electric motor did not exist yet). The concept was further developed by Ernesto Capocci of the Naples Observatory (1850), but it was not until 1872 that Henry Skey of Dunedin, New Zealand constructed the first working laboratory liquid mirror telescope."
"Another difficulty is that a telescope with a liquid metal mirror can only be used in zenith telescopes that look straight up at the zenith, so it is not suitable for investigations where the telescope must remain pointing at the same location of space ... Currently, the mercury mirror of the Large Zenith Telescope in Canada is the largest liquid metal mirror in operation. It has a diameter of six meters, and rotates at a rate of about 8.5 revolutions per minute."
Liquid mirror telescopes are telescopes with mirrors made with a reflective liquid. The most common liquid used is mercury. The container for the liquid is rotating so that the liquid assumes a paraboloidal shape. A paraboloidal shape is precisely the shape needed for the primary mirror of a telescope. The rotating liquid assumes the paraboloidal shape regardless of the container's shape. Liquid mirrors can be a low cost alternative to conventional large telescopes. Compared to a solid glass mirror that must be cast, ground, and polished, a rotating liquid metal mirror is much less expensive to manufacture.
"Isaac Newton noted that the free surface of a rotating liquid forms a circular paraboloid and can therefore be used as a telescope, but he could not actually build one because he had no way to stabilize the speed of rotation[citation needed] (the electric motor did not exist yet). The concept was further developed by Ernesto Capocci of the Naples Observatory (1850), but it was not until 1872 that Henry Skey of Dunedin, New Zealand constructed the first working laboratory liquid mirror telescope."
"Another difficulty is that a telescope with a liquid metal mirror can only be used in zenith telescopes that look straight up at the zenith, so it is not suitable for investigations where the telescope must remain pointing at the same location of space ... Currently, the mercury mirror of the Large Zenith Telescope in Canada is the largest liquid metal mirror in operation. It has a diameter of six meters, and rotates at a rate of about 8.5 revolutions per minute."
Variazione entropia
Un esercizio del prof. Mussino che propone un semplice calcolo della variazione d'entropia.
n.5 punto di massa ....
Problema d'esame del Prof. Mussino
Un punto di massa m viene lasciato dalla posizione A con velocità vo= 10 m/s lungo un piano inclinato con angolo θ = 30°; h vale 0.26 m, il coefficiente di attrito dinamico è μ=0.1. Calcolare quanto tempo impiega il punto per arrivare nella posizione B e quanto dovrebbe valere μ per far sì che il punto arrivi in B con velocità nulla.
Il ciclo di Carnot
Al link
http://books.google.it/books/about/R%C3%A9flexions_sur_la_puissance_motrice_du.html?id=YcY9AAAAMAAJ&redir_esc=y
il libro di Carnot dove descrve il ciclo.
Alcune pagine di una versione inglese del 1897
http://books.google.it/books/about/R%C3%A9flexions_sur_la_puissance_motrice_du.html?id=YcY9AAAAMAAJ&redir_esc=y
il libro di Carnot dove descrve il ciclo.
Alcune pagine di una versione inglese del 1897
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