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暖手器的工作原理

在暖手器中,金属板和含有特殊盐分的液体可以提供热量。这种盐可以是固体,也可以是液体。按压金属板时,液体结晶并释放热量。 作者:ZDF/3sat/nano/Autorenkombinat/Josephine Blume, Holger Barthel, Ingo Schwarz/Wiebke Müller/Maximilian Heß 翻译和配音:alugha 点击这里观看更多视频:https://alugha.com/TerraX

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Temperaturen in der Wüste

Tagsüber scheint die Sonne ungehindert auf den Wüstensand, und nachts sind keine Wolken am Himmel, die die Wärme in Erdnähe halten. Dadurch kann es zu sehr großen Temperaturschwankungen kommen. Author: ZDF/Tivi/1, 2 oder 3/Franziska Diesbach/Christian Jung/Chrioph Söhngen/Maximilian Heß Transkript

Propulsion effects in sailing

Sailing uses two propulsion effects: Drag and lift in combination. Wind pressure and air flow are responsible for the movement. Author: ZDF/Pur+/Autorenkombinat/Tobias Schönke/Rita Gerhardus-Faust/Jochen Schmidt Translation and dubbing: alugha Click here to watch more videos: https://alugha.com/T

Black cats and superstition

Black cats were condemned at the time of witch-hunts as companions of Satan and allies of witches. Even today, they are occasionally still considered to bring bad luck. Author: ZDF/Terra X/Spiegel TV/Nanje de Jong-Teuscher, Kirsten Hoehne/Anja Schütze, Uli Weinlein/Tricky Source: https://haustiger