JOURNAL OF ADVANCES IN PHYSICS https://rajpub.com/index.php/jap Khalsa Publications en-US JOURNAL OF ADVANCES IN PHYSICS 2347-3487 <p><a href="http://creativecommons.org/licenses/by/4.0/" rel="license"><img src="https://i.creativecommons.org/l/by/4.0/88x31.png" alt="Creative Commons License" /></a> All articles published in <em>Journal of Advances in Linguistics</em> are licensed under a <a href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>.</p> Efficient disruptive power plant-based heat engines doing work by means of strictly isothermal closed processes https://rajpub.com/index.php/jap/article/view/9587 <p><span style="font-weight: 400;">This research discusses a methodology to integrate strictly isothermal closed processes within thermal cycles characterized by working through contraction processes by extracting heat at free cost. An analysis of a preliminary design study of an engine and cycle doing useful work by expansion and contraction is carried out, whereby the energy balance equations are adjusted when considering contraction work as the core of the problem-solving strategy. The results of the preliminary design study will be applied to the implementation of the disruptive power unit prototype operating with real gasses as working fluids, which allows a precise and clear understanding of the issue of generating useful work through the expansion, contraction, and regeneration of heat by applying advanced heat recovery techniques to convert heat into useful work, thus achieving efficient power units that exhibit the ability to exceed 100% of added thermal energy due to the contribution of the contraction-based work performed at free cost..</span></p> Ramon Ferreiro Garcia Copyright (c) 2024 R. Ferreiro https://creativecommons.org/licenses/by/4.0 2024-02-24 2024-02-24 22 30 53 10.24297/jap.v22i.9587 The Effect of the Earth’s Rotation and Gravity on the Speed of Light https://rajpub.com/index.php/jap/article/view/9573 <p>Based on the results of the M ichelson ̆Morley experiment [1] and the direct measurement of the speed of light in two directions, we can conclude that the movement of the Earth in relation to the Sun and the movement of the solar system in relation to the center of the galaxy do not affect the measurement of the speed of light in the vicinity of the Earth. But on the other hand, based on results of the M ichelson ̆Morley experiment and the direct measurement of the speed of light in two directions we cannot know with certainty whether the Earth’s rotation around its axis affects the measurement of the speed of light in one direction. Thus, instead of the motion by which the Earth’s surface moves in relation to the Sun, we will observe the angular motion by which the Earth rotates on its axis relative to distant stars. Instead of measuring the speed of light in two directions, we will measure the speed of light in one</p> Miloš Čojanović Copyright (c) 2024 Miloš Čojanović https://creativecommons.org/licenses/by/4.0 2024-01-27 2024-01-27 22 16 29 10.24297/jap.v22i.9573 Laser heating of a finite silver sulfide slab (Ag2S). An elegant analytical solution using Laplace integral transform method. https://rajpub.com/index.php/jap/article/view/9561 <p><span style="font-weight: 400;">The problem of heating a finite silver sulfide slab with cw laser is studied using Laplace integral transform technique. For a certain laser power irradiance an expression for the temperature profile within the slab is obtained. The temperature variations with time for the front and rear surfaces are also obtained. The critical time required to initiate melting can thus be computed. Computations for an illustrative example are given. The obtained results reveal.</span></p> M.K.El Adawi S.A. Shalaby S.S. Mostafa S.A. Antar Copyright (c) 2024 M.K.El Adawi, S.A. Shalaby, S.S. Mostafa, S.A. Antar https://creativecommons.org/licenses/by/4.0 2024-01-27 2024-01-27 22 1 15 10.24297/jap.v22i.9561