World Journal of Applied Physics

Volume 5, Issue 3, September 2020

  • Radon Concentration and Its Ventilation Dependence Measured in Some Dwellings of Debresina, Ethiopia

    Abiy Tamiru Beshah, Tesfaye Dagne Muhe

    Issue: Volume 5, Issue 3, September 2020
    Pages: 34-38
    Received: 21 October 2020
    Accepted: 4 November 2020
    Published: 19 November 2020
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    Abstract: Ionizing radiation has been proved a major stress that can induce carcinogenesis. Among these ionizing radiations the most significant one is radon which is a source of 43% of the annual dose averaged over the population of the world. If it is present in enhanced level beyond maximum permissible limit, it may cause lung cancer. In the present work ... Show More
  • Methods for Joint Determination of the Surface Tension Coefficient of a Liquid and the Contact Angle of Wetting the Hard Surface

    Konstantin Ludanov

    Issue: Volume 5, Issue 3, September 2020
    Pages: 39-42
    Received: 4 November 2020
    Accepted: 17 November 2020
    Published: 27 November 2020
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    Abstract: This article is devoted to the development of fundamentally new methods for the experimental determination of the physical properties of substances - methods of their "joint determination", when not a single property is measured, but two physical properties connected with each other. For example, this is the coefficient of surface tension σ of the ... Show More