Fisica http://blogs.ugidotnet.org/Beyond/category/Fisica.aspx Fisica it-IT Raffaele Scaramella Subtext Version 2.6.0.0 Fisica: Sistema Internazionale di Unità http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5521.aspx <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">La fisica &#232; basata sulla misurazione, questa viene espressa per ogni grandezza fisica dalla sua unit&#224; mediante confronto con un campione di quella unit&#224;. Il campione deve essere accessibile e invariabile. Non tutte le grandezze fisiche sono indipendenti tra loro.&nbsp;La velocit&#224; ad esempio viene espressa come rapporto tra lo spazio e il tempo.</P> <DIV>Sono state scelte per convenzione sette Grandezze Fondamentali, che costituiscono il cosiddetto sistema internazionale di unit&#224; di misura.</DIV> <DIV>&nbsp;</DIV> <DIV> <TABLE class=MsoTableGrid style="BORDER-RIGHT: medium none; BORDER-TOP: medium none; BORDER-LEFT: medium none; BORDER-BOTTOM: medium none; BORDER-COLLAPSE: collapse; mso-border-alt: solid windowtext .5pt; mso-yfti-tbllook: 480; mso-padding-alt: 0cm 5.4pt 0cm 5.4pt; mso-border-insideh: .5pt solid windowtext; mso-border-insidev: .5pt solid windowtext" cellSpacing=0 cellPadding=0 border=1> <TBODY> <TR style="mso-yfti-irow: 0; mso-yfti-firstrow: yes"> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 104.4pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt" vAlign=top width=139> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B style="mso-bidi-font-weight: normal">Grandezza fondamentale<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></B></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 74.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" vAlign=top width=100> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B style="mso-bidi-font-weight: normal">Unit&#224;<o:p></o:p></B></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 52.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" vAlign=top width=70> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B style="mso-bidi-font-weight: normal">Simbolo<o:p></o:p></B></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: windowtext 1pt solid; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 260.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt" vAlign=top width=348> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt"><B style="mso-bidi-font-weight: normal">Definizione<o:p></o:p></B></P></TD></TR> <TR style="mso-yfti-irow: 1"> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 104.4pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=139> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">lunghezza<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 74.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=100> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">metro<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 52.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=70> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">m<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 260.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=348> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">Il metro &#232; la lunghezza del cammino percorso dalla luce nel vuoto durante un intervallo di tempo di 1/299.792.458 di secondo.<o:p></o:p></P></TD></TR> <TR style="mso-yfti-irow: 2"> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 104.4pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=139> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">massa<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 74.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=100> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">chilogrammo<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 52.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=70> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">kg<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 260.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=348> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">Il chilogrammo &#232; uguale alla massa del campione internazionale.<o:p></o:p></P></TD></TR> <TR style="mso-yfti-irow: 3"> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 104.4pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=139> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">tempo<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 74.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=100> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">secondo<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 52.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=70> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">s<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 260.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=348> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">Il secondo &#232; la durata di 9.192.631.770 periodi della radiazione corrispondente alla transazione tra due livelli iperfini dello stato fondamentale dell&#8217;atomo di cesio 133.<o:p></o:p></P></TD></TR> <TR style="mso-yfti-irow: 4"> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 104.4pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=139> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">corrente elettrica<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 74.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=100> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">ampere<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 52.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=70> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">A<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 260.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=348> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">L&#8217;ampere &#232; la corrente costante che, se mantenuta in due conduttori rettilinei paralleli di lunghezza infinita, di sezione circolare trascurabile, e posti nel vuoto a distanza di un metro, produrrebbe tra questi conduttori uan forza uguale a 2 x 10^-7 newton per metro di lunghezza.<o:p></o:p></P></TD></TR> <TR style="mso-yfti-irow: 5"> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 104.4pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=139> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">temperatura termodinamica<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 74.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=100> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">kelvin<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 52.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=70> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">K<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 260.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=348> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">Il kelvin &#232; la frazione 1/273,16 della temperatura termodinamica del punto triplo dell&#8217;acqua.<o:p></o:p></P></TD></TR> <TR style="mso-yfti-irow: 6"> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 104.4pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=139> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">quantit&#224; di sostanza<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 74.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=100> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">mole<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 52.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=70> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">mol<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 260.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=348> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">La mole &#232; la quantit&#224; di sostanza di un sistema che contiene tante entit&#224; elementari quanti atomi ci sono in <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" /><st1:metricconverter w:st="on" ProductID="0,012 chilogrammi">0,012 chilogrammi</st1:metricconverter> di carbonio 12.<o:p></o:p></P></TD></TR> <TR style="mso-yfti-irow: 7; mso-yfti-lastrow: yes"> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: windowtext 1pt solid; WIDTH: 104.4pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=139> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">intensit&#224; luminosa<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 74.8pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=100> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">candela<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 52.85pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=70> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">cd<o:p></o:p></P></TD> <TD style="BORDER-RIGHT: windowtext 1pt solid; PADDING-RIGHT: 5.4pt; BORDER-TOP: #ebe9ed; PADDING-LEFT: 5.4pt; PADDING-BOTTOM: 0cm; BORDER-LEFT: #ebe9ed; WIDTH: 260.65pt; PADDING-TOP: 0cm; BORDER-BOTTOM: windowtext 1pt solid; BACKGROUND-COLOR: transparent; mso-border-alt: solid windowtext .5pt; mso-border-left-alt: solid windowtext .5pt; mso-border-top-alt: solid windowtext .5pt" vAlign=top width=348> <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">La candela &#232; l&#8217;intensit&#242; luminosa, in una direzione assegnata, di una sorgente che emette radiazione monocromatica di frequenza 540 x 10^12 hertz e che ha una intensit&#224; radiante di quella direzione di 1/683 watt per steradiante.<o:p></o:p></P></TD></TR></TBODY></TABLE></DIV> <DIV>&nbsp;</DIV> <DIV>Vedi</DIV> <DIV><A href="http://physics.nist.gov/cuu/Units/current.html">http://physics.nist.gov/cuu/Units/current.html</A></DIV> <DIV><A href="http://physics.nist.gov/cuu/Units/units.html">http://physics.nist.gov/cuu/Units/units.html</A></DIV><img src="http://blogs.ugidotnet.org/Beyond/aggbug/5521.aspx" width="1" height="1" /> Raffaele Scaramella http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5521.aspx Tue, 16 Nov 2004 01:41:00 GMT http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5521.aspx#feedback http://blogs.ugidotnet.org/Beyond/comments/commentRss/5521.aspx http://blogs.ugidotnet.org/Beyond/services/trackbacks/5521.aspx Fisica: Definizione di Valore http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5517.aspx <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">Il valore di una grandezza fisica &#232; l&#8217;espressione quantitativa di una particolare grandezza fisica come un prodotto di un numero e di una unit&#224;, in cui il numero costituisce il valore numerico. Perci&#242;, il valore numerico di una particolare grandezza fisica dipende dall&#8217;unit&#224; nella quale viene espressa.</P><img src="http://blogs.ugidotnet.org/Beyond/aggbug/5517.aspx" width="1" height="1" /> Raffaele Scaramella http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5517.aspx Tue, 16 Nov 2004 01:21:00 GMT http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5517.aspx#feedback http://blogs.ugidotnet.org/Beyond/comments/commentRss/5517.aspx http://blogs.ugidotnet.org/Beyond/services/trackbacks/5517.aspx Fisica: Definizione di Quantità http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5515.aspx Una quantit&#224; fisica &#232; una quantit&#224; che pu&#242; essere adoperata nelle equazioni matematiche della scienza e della tecnologia.<img src="http://blogs.ugidotnet.org/Beyond/aggbug/5515.aspx" width="1" height="1" /> Raffaele Scaramella http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5515.aspx Tue, 16 Nov 2004 01:20:00 GMT http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5515.aspx#feedback http://blogs.ugidotnet.org/Beyond/comments/commentRss/5515.aspx http://blogs.ugidotnet.org/Beyond/services/trackbacks/5515.aspx Fisica: Definizione di Unità http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5516.aspx <P class=MsoNormal style="MARGIN: 0cm 0cm 0pt">Una unit&#224; &#232; una grandezza fisica particolare, definita ed adottata per convenzione, con la quale vengono paragonate altre particolari grandezze della stessa specie al fine di esprimere il loro valore.</P><img src="http://blogs.ugidotnet.org/Beyond/aggbug/5516.aspx" width="1" height="1" /> Raffaele Scaramella http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5516.aspx Tue, 16 Nov 2004 01:20:00 GMT http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5516.aspx#feedback http://blogs.ugidotnet.org/Beyond/comments/commentRss/5516.aspx http://blogs.ugidotnet.org/Beyond/services/trackbacks/5516.aspx Fisica: Definizione di Grandezza http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5514.aspx Una grandezza in senso generale &#232; una propriet&#224; attribuita a fenomeni, corpi o sostanze che pu&#242; essere quantificata, o assegnata ad un particolare fenomeno, corpo o sostanza<img src="http://blogs.ugidotnet.org/Beyond/aggbug/5514.aspx" width="1" height="1" /> Raffaele Scaramella http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5514.aspx Tue, 16 Nov 2004 01:19:00 GMT http://blogs.ugidotnet.org/Beyond/archive/2004/11/16/5514.aspx#feedback http://blogs.ugidotnet.org/Beyond/comments/commentRss/5514.aspx http://blogs.ugidotnet.org/Beyond/services/trackbacks/5514.aspx Fondamenti di Fisica http://blogs.ugidotnet.org/Beyond/archive/2004/10/10/4062.aspx <!-- Posted by IMHO 1.0 Instant Blogger by A.Boschin 2004. http://www.elite.boschin.it --> <P>Oltre al corso di <A href="http://blogs.ugidotnet.org/beyond/archive/2004/10/04/3705.aspx">Teoria della Computazione</A> sto preparando l'esame di Fisica I. Conosco molte persone che troverebbero questo esame inutile oltre che noioso. Tuttavia, io trovo questa materia affascinante. Poter spiegare&nbsp;<STRONG><EM>"perché"</EM></STRONG> &nbsp;accade un fenomeno&nbsp;lo trovo semplicemente fantastico.</P> <P>Peccato non avere tempo per approfondire. <img src="http://blogs.ugidotnet.org/images/blogs_ugidotnet_org/beyond/372/o_emot-crying.gif" ></P> <P>&nbsp;</P> <P>Fletto i muscolo e sono in un moto verticale. <img src="http://blogs.ugidotnet.org/images/blogs_ugidotnet_org/beyond/372/o_emot-highfive.gif" ></P> <P>&nbsp;</P> <P>Powered by IMHO</P><img src="http://blogs.ugidotnet.org/Beyond/aggbug/4062.aspx" width="1" height="1" /> Raffaele Scaramella http://blogs.ugidotnet.org/Beyond/archive/2004/10/10/4062.aspx Sun, 10 Oct 2004 00:04:00 GMT http://blogs.ugidotnet.org/Beyond/archive/2004/10/10/4062.aspx#feedback http://blogs.ugidotnet.org/Beyond/comments/commentRss/4062.aspx http://blogs.ugidotnet.org/Beyond/services/trackbacks/4062.aspx Fisica: Moto dei Proiettili, Quiz 1 http://blogs.ugidotnet.org/Beyond/archive/2004/10/09/4061.aspx <!-- Posted by IMHO 1.0 Instant Blogger by A.Boschin 2004. http://www.elite.boschin.it --> <P>Date due palle da golf, una lasciata cadere da fermo e l'altra sparata orizzontalmente da un meccanismo a molla. In assenza di resistenza dell'aria, quale toccherebbe il terreno per prima ?</P> <P>PS. Conseguenze dello studio di Fondamenti di Fisica.</P> <P>Powerd by IMHO</P><img src="http://blogs.ugidotnet.org/Beyond/aggbug/4061.aspx" width="1" height="1" /> Raffaele Scaramella http://blogs.ugidotnet.org/Beyond/archive/2004/10/09/4061.aspx Sat, 09 Oct 2004 23:52:00 GMT http://blogs.ugidotnet.org/Beyond/archive/2004/10/09/4061.aspx#feedback 8 http://blogs.ugidotnet.org/Beyond/comments/commentRss/4061.aspx http://blogs.ugidotnet.org/Beyond/services/trackbacks/4061.aspx