Fizika 7 Razred Zadaci I Rjesenja Top Site

( G = m \cdot g = 45 , kg \times 10 , N/kg = 450 , N )

Da stoji na dvije noge, površina bi bila dvostruka (0.04 m²), a tlak bi bio upola manji (20 kPa). Zadatak 7 (Tlak u tekućini – hidrostatski tlak) Tekst: Na kojoj dubini u moru (ρ = 1020 kg/m³) tlak iznosi 200,000 Pa? (g = 10 N/kg)

a) 1 cm = 0.01 m → 250 cm = 250 × 0.01 = 2.5 m b) 1 h = 3600 s → 1.5 h = 1.5 × 3600 = 5400 s c) 1 mL = 1 cm³ = 0.000001 m³ → 300 mL = 300 × 0.000001 = 0.0003 m³ (ili 3×10⁻⁴ m³) 2. Gustoća Tvari (ρ) Gustoća je jedan od najčešćih tipova zadataka na testovima. Formula glasi:

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