American Journal of Modern Physics

Volume 12, Issue 2, March 2023

  • The Thermodynamics Cycles with a Reversible Chemical Reaction

    Kanysh Sabdenov

    Issue: Volume 12, Issue 2, March 2023
    Pages: 14-20
    Received: Mar. 31, 2023
    Accepted: Apr. 17, 2023
    Published: Jun. 09, 2023
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    Abstract: The relevance: In the modern world, there is an urgent need for the efficient use of all possible heat sources for the subsequent production of mechanical work or electrical energy. The gradual depletion of fossil fuels on the planet is bringing humanity closer to a large-scale energy crisis. Since the conversion of heat into freely convertible wor... Show More
  • Approximation of the Sum of a Power Series by Its First Four Terms

    Konstantin Ludanov

    Issue: Volume 12, Issue 2, March 2023
    Pages: 21-29
    Received: May 16, 2023
    Accepted: Jun. 05, 2023
    Published: Jun. 20, 2023
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    Abstract: The paper develops a three-parameter method for approximating the sum of the McLaurin series by its first four expansion terms, which allows obtaining analytical approximations for functions that are expanded into a power series. The expressions for the approximation parameters (a, b, c) of the exact sum ∑(S) of the geometric power series-base are ... Show More