Chemical News and Journal of Industrial Science, Tom 144,Wydanie 3755Chemical news office., 1932 |
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Strona 211
... ordinary temperature ; x hydrogen has not yet been prepared pure , ẞ hydrogen has the lower specific heat and melts at 13.83 ° k as against 18.96 k for " ordinary hydrogen . " It is being discovered that these two forms of hydrogen have ...
... ordinary temperature ; x hydrogen has not yet been prepared pure , ẞ hydrogen has the lower specific heat and melts at 13.83 ° k as against 18.96 k for " ordinary hydrogen . " It is being discovered that these two forms of hydrogen have ...
Strona 216
... ordinary size ; and the greater the dimen- sions of the hall the more prolonged will be the reverberation . If the walls and ceiling of the room be covered with some highly sound - absorbent material , a few reflections may suffice to ...
... ordinary size ; and the greater the dimen- sions of the hall the more prolonged will be the reverberation . If the walls and ceiling of the room be covered with some highly sound - absorbent material , a few reflections may suffice to ...
Strona 218
... ordinary plaster . both of coefficient 0.03 , by a material of coefficient 0.25 , so as to obtain 986 additional units of absorption . The net coefficient of the acoustic material will be 0.22 , and the area necessary will be 986 0.22 ...
... ordinary plaster . both of coefficient 0.03 , by a material of coefficient 0.25 , so as to obtain 986 additional units of absorption . The net coefficient of the acoustic material will be 0.22 , and the area necessary will be 986 0.22 ...
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