๐”– Bobbio Scriptorium
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Vacuum container incorporating a hand operated vacuum pump

Publisher
Elsevier Science
Year
1956
Tongue
English
Weight
116 KB
Volume
6
Category
Article
ISSN
0042-207X

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cm s "2 , o is surface tension between liquid and its vapour in dyne cm "1 , and Pv, Pl are vapour and liquid densities in g cm "3 . Using data for liquid helium at 4.2 K, this equation gives 0.575 < qmax < 0.760 W cm "2 . This is comparable with the results shown in Fig. for the vertical heated su