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Akú hmotnost v gramoch a aky objem v ml potrebujeme na pripravu 500 ml 3% roztoku NaCl, hustota je 1,017 g.cm-3. Má niekto správne riešenie? Potrebujem overiť postup a výsledok🙂
Pri obrane stredovekého hradu bol z veže z výšky 25m nad vodorovným povrchom Zeme vrhnutý samostrelom kameň rýchlosťou 15m/s pod uhlom 30°. Určte a) ako dlho sa kameň pohyboval, b) v akej…
Pri obrane stredovekého hradu bol z veže z výšky 25m nad vodorovným povrchom Zeme vrhnutý samostrelom kameň rýchlosťou 15m/s pod uhlom 30°. Určte a) ako dlho sa kameň pohyboval, b) v akej…
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