Раскрыты подробности похищения ребенка в Смоленске09:27
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Leonardo da Vinci is usually credited with conducting the first systematic study of friction in the late 15th century, a subfield now known as tribology that deals with the dynamics of interacting surfaces in relative motion. Da Vinci's notebooks depict how he pulled rows of blocks using weights and pulleys, an approach that is still used in frictional studies today, as well as examining the friction produced in screw threads, wheels, and axles. The authors of this latest paper used an experimental setup similar to da Vinci's.
"People are about 10 times more likely to die in a fire if there isn't a working smoke alarm in the property," says Suzanna Amberski, head of customer and building safety at Kent Fire & Rescue Service. Her organisation alone found roughly 6,500 expired smoke alarms in Kent properties between 2022 and 2024.