Polecamy Artykuły Nowości
Sahara to nie tylko piasek…
Słysząc słowo Sahara, najczęściej wyobrażamy sobie bezkresne powierzchnie pokryte żółtym piaskiem. Czy to prawdziwy obraz? Niezupełnie.
Roślinny Feniks
Ta wyjątkowa roślina przetrwa nie tylko długotrwałą suszę. Nie straszny jej nawet pożar.
Podziały kwadratu i twierdzenie…
Na ile trójkątów o rozłącznych wnętrzach można podzielić kwadrat? Na ile trójkątów o rozłącznych wnętrzach i jednakowych polach można podzielić kwadrat?
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Niagara – widoczne dwie części: American i Canadian Falls. </span><span style="font-size:11.0pt;line-height:115%;font-family:"Calibri","sans-serif";
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EN-US;mso-bidi-language:AR-SA" lang="EN-US">Fot. Safron Blase, źródło: <a href="http://commons.wikimedia.org/wiki/Niagara_Falls#mediaviewer/File:Niagara_Falls_Storm.jpg">http://commons.wikimedia.org/wiki/Niagara_Falls#mediaviewer/File:Niagara_Falls_Storm.jpg</a></span><!--[if gte mso 9]><xml>
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Wodny spektakl
Czy jest wśród Was ktoś, kto nie słyszał o wodospadzie Niagara? Wodospad ten znajduje się na granicy Kanady i Stanów Zjednoczonych. Nie jest największy na świecie, nie niesie najwięcej wody. W czym tkwi jego magia?
Pierwszy barometr
Kiedy około roku 1641 Włoch Gasparo Berti przeprowadzał swój eksperyment, wcale nie miał zamiaru zostać prekursorem barometru. Chciał się jedynie dowiedzieć, dlaczego nie można odpompować wody ze studni głębszych niż 10 metrów.