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This study focuses on evaluating three methods used to determine the theoretical gravity in the city of Cusco and their importance in distance education. The first method is based on Newton's law of universal gravitation, obtaining a theoretical gravity value of 9.7836 m/s^2. The second method employs a simple pendulum, which provides an estimation close to the theoretical value. The third method uses the Tracker software to analyze the pendulum's motion, offering higher precision in measurements. The significance of this research in distance education lies in the need for effective tools and strategies to teach practical subjects like physics. Both the simple pendulum and Tracker software provide viable solutions for conducting experiments and data analysis remotely. These tools allow students to acquire theoretical and practical knowledge, develop measurement and data analysis skills to promote more meaningful learning., Comment: in Spanish language

In this scientific article, the data on air pollution by PM2.5 particulate matter was evaluated in different locations in the city of Cusco with respect to the Environmental Quality Indexes (INCA) of the Ministry of the Environment of the Peruvian Government. The results show that air pollution in the city of Cusco is an environmental risk problem. More than 84% of the monitored sites have a bad rating (101-500), the corresponding color is orange. This result shows that the air that citizens of Cusco breathe is of poor quality and the population could experience health problems. The recommendation is to avoid outdoor exercises and activities. In the district of San Jeronimo Cusco, the average concentration has been 125 ug/m3, which corresponds to the INCA interval of more than 125, within the red color threshold for care. The health effects are described as chronic lung and cardiovascular diseases, and the health authority should declare levels of alert. It has been concluded that according to INCA, the air in the city of Cusco is of poor quality and falls within the threshold of the Care State Value (VUEC)., Comment: in Spanish language

The study utilizes data corresponding to the average monthly concentration of particulate matter 2.5 (P.M. 2.5), relative humidity, and precipitation during the period 2016-2018 collected by the High Vol station of the Energy and Atmosphere Center, and the meteorological center SENAHMI (Kayra-UNSAAC). In order to estimate the statistical relationship between two quantitative variables, the Pearson and Spearman correlation coefficients are used, which were obtained using the Python programming language. The obtained t-value is compared with the Student's t-distribution table for a certain level of significance $(\alpha = 0.05)$. Positive and negative correlation values are established based on the obtained coefficients, and the interpretation of the Pearson and Spearman correlation values is used to determine if the data is related or not., Comment: in Spanish language

This study deals with the estimation of the trajectory of coronavirus COVID-19 adhering to respiratory droplets projected horizontally, considering the geographical altitude. The size of viruses and respiratory droplets is the factor that determines the trajectory of the microparticles in a viscous medium such as air; For this purpose, a graphical comparison of the diameters and masses of the microparticles produced in respiratory activity has been made. The estimation of the vertical movement of the microparticles through the air is based on Stokes' Law, it was determined that respiratory droplets smaller than 10 {\mu}m in diameter have very small speeds, in practice they are floating for a few seconds before evaporating in the air; Regarding the horizontal displacement of respiratory droplets, frames from Scharfman et al. to determine its scope. In the case of a sneeze, the respiratory droplets can reach a distance of 1.65 m in 1 s, stopping rapidly until reaching 1.71 m in 2 seconds, then an analysis of the effect of geographical altitude on the movement of the micro-droplets was made, determining minimal change in kinematic variables., Comment: 9 paginas, in Spanish, 7 figuras