Comparación de los precios del cemento y salarios en los diversos países
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Materials Literature
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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Reaction between Ferrous Iron and Peroxides. I. Reaction with Hydrogen Peroxide in the Absence of OxygenI. M. Kolthoff and A. I. MedaliaCite this: J. Am. Chem. Soc. 1949, 71, 11, 3777–3783Publication Date (Print):November 19, 1949Publication History Published online1 May…
It is well known that voltage transformers of the usual electromagnetic type constitute a very costly item in high-voltage systems. Considerable savings could be effected by the use of voltage transformers of the capacitor type if their design could be perfected to give sufficient accuracy, i.e. if their ratio errors…
The self-diffusion coefficient of argon was measured at five different temperatures between −183°C and 53.5°C by observing the diffusion of radioactive A41 into normal argon. The decrease in the observed diffusion coefficient caused by the larger mass of A41 was deduced and found to be 0.6 percent. The experimental va…