English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Isotherms of the speed of sound in helium 4 gas as a function of pressure have been measured. Five of the isotherms in the liquid helium 4 temperature range have been analyzed, and the results are discussed. The acoustically determined values of temperature are consistently higher than the values of temperature associated with the liquid helium 4 vapor pressure scale (T 58 ). The deviations are 0.006 °K at 2.323 °K. 0.007 °K at 2.807 °K, 0.008 °K at 3.211 °K, 0.010 °K at 4.212 °K and 0.012°K at 5.024 °K.

Isotherms determined by the National Bureau of Standards acoustical thermometer in the liquid helium temperature range