Variation of surface tension coefficient σ of distilled water under high-energy impact (hydrodynamic cavitation) was studied by the ring separation method. Force impacts on surface tension of water have been studied experimentally. Conditions have been found under which the surface tension coefficient σ decreases to 20%. The paper explains the produced results on the basis of cluster theory of water structure. The experimentally produced relaxation time of the surface tension of cavitation-activated distilled water to initial value has been found to be 3.5 hours.

The social networking influences all areas of society and stimulates the activity of the social networks communities. Later the importance of social networks revised the researches of the sociological aspects of social solidarity. Solidarity of modern society intensifies according to a sharp increase of possibilities to communicate with the help of the social networks that has become tools of forming the online communities. The authors suggest a new term for characteristics of a new solidarity at network communities – online solidarity. This term shows the connotation with the Internet; it also shows that online solidarity arises on micro level of the interpersonal relations. In the article authors analyze the term and characteristics of online solidarity in network communities and represent the results of the original research (questionnaire, 2019) “Students on Social Networks”. The authors come to conclusion that users with lots of “friends” at social networks feel more successful and socially demanded. Despite of its flexibility and lightness online-solidarity plays an important role in the society and has an influence on the macro level of society.

At the same time, despite the deadly «topicality» of the problem of corruption, there is still no clearly expressed political will of the international community in combating corruption on a global scale, free from double standards and unsystematic and illogical actions. Currently there is no сommonly-accepted and conventionally fixed definition of corruption. The legislation of both developed countries and countries with economies in transition defines the term «corruption» in different ways. It is filled with different meanings and constituent elements, different in nature and structure. This fact is a consequence of the disinclination of many states to burden themselves with interstate corruption combat liabilities. Most of the acts of international organizations, which are aimed at combating corruption crimes, solve only single aspects of the said problem. Public organizations and movements undoubtedly occupy one of the key places in the system of subjects that ensure the implementation of anti-corruption policies in most states. This also applies to Ukraine.

One of the main features of international political and legal development is the unresolved problem of national security of the state and international security. This is particularly relevant in the current globalized environment, when the economy, informatization and democratization of international relations create unprecedented opportunities for development, but at the same time increase the vulnerability of the system to terrorism, the use of weapons of mass destruction, etc. Scientists of our time are faced with urgent tasks, the solution of which allows the study of the problems of state creation, especially such important determinants of this process as legal regulation in the field of national and international security of the state in the context of globalization. Proceeding from this,scientific researches in this context, in which the basic principles of organization of national and international security are systematically revealed, are expedient and timely

в настоящее время социальные сетевые медиа играют заметную роль во всех сферах жизнедеятельности. Они помогают осуществлять социальные стратегии и практики во многих сферах общества, в том числе и в образовании. Пандемия COVID-19 потребовала перехода на дистанционное обучение, к которому активно подключились социальные сети. Все многообразие дистанционнных форм обучения можно разделить на синхронные формы обучения, ассинхронные и смешанные формы. Социальные медиа позволяют сделать дистанционный формат интереснее, вовлекать студентов в дискуссии, усиливать наглядность, использовать игровые практики и изучать практические кейсы. nowadays social media plays a prominent role in all spheres of life. They help to put into practice social strategies and practices in many aspects of social life, including education. The COVID-19 pandemic has demanded a transition to distance learning, and social networks were positively included in this process. All the variety of distance learning forms can be divided into synchronous forms of learning, asynchronous and hybrid forms. Social media makes it possible for the distance learning to be more interesting, to involve students in discussions, to improve visual teaching methods, to use games practices, and to consider practical cases.