Full resolution (JPEG) - On this page / på denna sida - 2. Mått, vikter, enheter etc. - Värme
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Mässing .......... 50—100
Nickel .............. 50
Papper, enbart........0,16
Papper, skiktavst. 1 mm 0,03
Porslin .............. 0,9
80
Steatit................2,87
Stenkol ..............0,12
Tegel ................0,35
Tenn ................ 54
Vatten .............. 0,5
e) Värmeutvidgning.
Längdutvidgningskoefficienten a angiver ökningen av
längdenheten hos en kropp vid 1° temperaturökning.
Ytutvidgningskoefficienten = la.
Volymutvidgningskoefficienten = 3 a för fasta kroppar. För
alla gasformiga kroppar blir utvidgningen för samma tryck
vid varje grads ökning av temperaturen i det närmaste 1/273
= 0,0036618 av volymen.
Längdutvidgningskoefficienten för 1° C:
Längdutvidgning (10"*)
Aluminium ................................................................................23,8
Antimon ....................................................................................10,8
Bly ............................................................................................29,2
Brons ........................................................................................17,5
Elektron ....................................................................................24,0
Gips............................................................................................25,0
Glas............................................................................................8,0
Guld ........................................................................................14,4
Hårdgummi ............................................................................77,0
Iridium ....................................................................................6,5
Järn och stål............................................................................11,5
Kobolt........................................................................................12,7
Konstantan ............................................................................15,2
Koppar ....................................................................................18,5
Kvartsglas ................................................................................0,5
Magnalium................................................................................24
Magnesium................................................................................26
Meteorit....................................................................................30
Mässing ....................................................................................18,5
Nickel ........................................................................................13,1
Nickelstål med 36% nickel ................................................1,6
D:o med 58% nickel............................................................12,0
Nysilver ....................................................................................18
Platina ....................................................................................9,0
Platiniridium ............................................................................8,8
Porslin........................................................................................3,0
Silver ........................................................................................19,7
Svavel ........................................................................................9,0
Tantal .......................................................................................6,5
Tenn ........................................................................................23,0
Vismut........................................................................................13,4
Zink............................................................................................26,7
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