The objective of this work is to present a model in tidal theory using what is known in the literature as the gravitational dumbbell model. To this end, we initially study in detail the foundations of the problem, such ...

The present work implements a dynamic classical model of machines on complex plane. For this goal, the state equations for the machine angle, 𝛿 and for the machine rotor speed, 𝜔, will be developed in complex domain. ...

The transition to renewable energy sources is crucial for mitigating climate change and promoting energy sustainability. Hydrogen, obtained through electrolysis using renewable sources such as photovoltaic solar energy, ...

Climate changes are alterations in the climate caused by global warming, which results from the increased emission of anthropogenic Greenhouse Gases (GHG). These climate alterations pose a significant challenge to the ...

In Brazil, due to population growth and extreme weather events, there is increasing pressure on the water matrix, leading to more frequent scenarios of scarcity and conflicts over water use. Therefore, there is an increasing ...

Considering the current expansion of the financial market and the various options of products and services available, financial education becomes essential for individuals to make sensible decisions regarding their ...

The study of chemical evolution is of great importance for comprehending the evolution of the Universe. Models and observations indicate an inside-out scenario for the formation of spiral galaxy disks. Chemical abundance ...

Protists are highly diverse unicellular microeukaryotes found in a wide range of habitats. They play important roles in nutrient cycling and ecosystem maintenance. However, much of protist diversity remains unknown, ...

The production of teaching materials can be a formative process for future teachers to seek to insert the History of Science (HC) in Chemistry Teaching. This training strategy can minimize problems around the absence or ...