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Dobrý den mohl by mě někdo prosím pomoci vyřešit tuto rovnici 6x-2y=-6 9x+7y=31
V nádobě je ethanol o objemu 2,5 litru a teplotě 0°C. O kolik procent se zvětší objem ethanolu, zahřejeme-li jej na teplotu 31°C? Teplotní součinitel objemové roztažnosti ethanolu je 1,1…
Rtuť má při teplotě 10°C hustotu 13 570 kg.m–3. Při jaké teplotě bude mít hustotu 13 480 kg.m–3, je-li teplotní součinitel objemové roztažnosti rtuti 1,8.10–4 K–1?
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