SOLUCIONES / EJERCICIOS DE PRESIÓN HIDROSTÁTICA PARA REPASAR 1. h = 15 cm → h = 0.15 m daceite = 880 kg / m^3 a) P = h · d · g P = 0.15 · 880 · 9.8
P = 1293.6 Pa b) F=P·S F = 1293.6 · 7.85 · 10-3
F = 10.15 N c) Volumen cilindro = π · r2 · h Volumen cilindro = π · 0.052 · 0.15 Volumen cilindro (aceite) = 1.18 · 10-3 m^3
m=d·V m = 880 · 1.18 · 10-3 m = 1.04 kg P=m·g P = 1.04 · 9.8
P = 10.19 N 2. dagua = 1000 kg / m^3 h=4m P=h·d·g P = 4 · 1000 · 9.8
P = 39200 Pa
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h=? P = 20000 hPa → 2000000 Pa d = 1027 kg / m^3 P=h·d·g 2000000 = h · 1027 · 9.8 2000000 = 10064.6 · h
h = 198.72 m
4. h = 10 km → 10000 m d = 1027 kg / m^3 a) P = h · d · g P = 10000 · 1027 · 9.8 P = 100646000 Pa b) S = 500 cm2 → 0.05 m2
F = 100646000 · 0.05
F = 5032300 N
5. P=? h = 300 m d = 1030 kg / m^3 P=h·d·g P = 300 · 1030 · 9.8
P = 3028200 Pa
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6. P=? h=3m d = 1000 kg / m^3 P=h路d路g P = 3 路 1000 路 9.8
P = 29400 Pa
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