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Jak velká bude výsledná síla, když na těleso působí síly F1=6kN a F2=3kN když svírají úhel 60 stupňů?
Voda v kalorimetru má teplotu 20°C. Vložíme do ní železný váleček o hmotnosti 0,4 kg a teplotě 100 °C. Výsledná teplota je 30 °C. Jakou hmotnost měla voda ?
Voda v kalorimetru má teplotu 20°C. Vložíme do ní železný váleček o hmotnosti 0,4 kg a teplotě 100 °C. Výsledná teplota je 30 °C. Jakou hmotnost měla voda ?
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