#Физика #ЗадачиИзЖизни #УтренняяРазминка Сегодня в качестве утренней разминки забавная задачка по физике. Ответ можно увидеть по кнопке “Лампочка”, проголосовав за один из вариантов в анонимном опросе ниже. Итак, у вас минута на размышление. Делитесь этой задачкой с друзьями!
Нижняя цепь на рисунке сначала висела так же свободно, как и верхняя (лишь её концы были закреплены). Потом нижнюю цепь натянули, потянув её середину вниз. Что при этом произошло с центром тяжести цепи – он поднялся, опустился или остался на месте?
#Физика #ЗадачиИзЖизни #УтренняяРазминка Сегодня в качестве утренней разминки забавная задачка по физике. Ответ можно увидеть по кнопке “Лампочка”, проголосовав за один из вариантов в анонимном опросе ниже. Итак, у вас минута на размышление. Делитесь этой задачкой с друзьями!
Нижняя цепь на рисунке сначала висела так же свободно, как и верхняя (лишь её концы были закреплены). Потом нижнюю цепь натянули, потянув её середину вниз. Что при этом произошло с центром тяжести цепи – он поднялся, опустился или остался на месте?
BY Kvantland | Квантландия | Интересные задачи и не только
Since its launch in 2013, Telegram has grown from a simple messaging app to a broadcast network. Its user base isn’t as vast as WhatsApp’s, and its broadcast platform is a fraction the size of Twitter, but it’s nonetheless showing its use. While Telegram has been embroiled in controversy for much of its life, it has become a vital source of communication during the invasion of Ukraine. But, if all of this is new to you, let us explain, dear friends, what on Earth a Telegram is meant to be, and why you should, or should not, need to care. "There is a significant risk of insider threat or hacking of Telegram systems that could expose all of these chats to the Russian government," said Eva Galperin with the Electronic Frontier Foundation, which has called for Telegram to improve its privacy practices. Telegram has gained a reputation as the “secure” communications app in the post-Soviet states, but whenever you make choices about your digital security, it’s important to start by asking yourself, “What exactly am I securing? And who am I securing it from?” These questions should inform your decisions about whether you are using the right tool or platform for your digital security needs. Telegram is certainly not the most secure messaging app on the market right now. Its security model requires users to place a great deal of trust in Telegram’s ability to protect user data. For some users, this may be good enough for now. For others, it may be wiser to move to a different platform for certain kinds of high-risk communications. Since January 2022, the SC has received a total of 47 complaints and enquiries on illegal investment schemes promoted through Telegram. These fraudulent schemes offer non-existent investment opportunities, promising very attractive and risk-free returns within a short span of time. They commonly offer unrealistic returns of as high as 1,000% within 24 hours or even within a few hours. On December 23rd, 2020, Pavel Durov posted to his channel that the company would need to start generating revenue. In early 2021, he added that any advertising on the platform would not use user data for targeting, and that it would be focused on “large one-to-many channels.” He pledged that ads would be “non-intrusive” and that most users would simply not notice any change.
from hk
