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"Příklady": {
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"Příklady": {
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"lastUpdated": 1664876247262
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"Hydrostatický paradox": {
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"Hydrostatický paradox": {
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30
notes/fyz/Mechanika tekutin/Hydrostatická tlaková síla.md
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notes/fyz/Mechanika tekutin/Hydrostatická tlaková síla.md
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# Hydrostatická tlaková síla
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$F_h=mg=\rho Vg=\rho Shg$
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$F_h=h\rho gS$
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hydrostatický tlak: $p_h=\frac{F_h}S=h\rho g$
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Objevuje se [Hydrostatický paradox](Hydrostatický paradox.md).
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---
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## Příklady
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Potápěč sestoupil na dno jezera do hloubky 28m.
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Jaký je v této hydrostatický tlak? $250kPa$
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Jak velká je v této hloubce hydrostatická tlaková síla která působí na plochu o obsahu $1cm^2$?
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$p_h=h\rho g$
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$p_h=28*10^3*10$
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$p_h=250kPa$
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$F_h=p_h*S$
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$F_h=28*10^4*1*10^{-4}$
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$F_h=28N$
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(Bruno neumí fotit)
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----
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10
notes/fyz/Mechanika tekutin/Hydrostatický paradox.md
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notes/fyz/Mechanika tekutin/Hydrostatický paradox.md
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# Hydrostatický paradox
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Velikost tlakové síly kapaliny na dno nádoby nezávisí na hmotnosti kapaliny v nádobě.
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$F=p S=\rho ghS$
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jestliže je všude $h$ a $S$ stejné, bude na dno působit stejný hydrostatický tlak.
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# Mechanika tekutin
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%% Zoottelkeeper: Beginning of the autogenerated index file list %%
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- [[fyz/Mechanika tekutin/Hydraulická zařízení|Hydraulická zařízení]]
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- [[fyz/Mechanika tekutin/Hydrostatická tlaková síla|Hydrostatická tlaková síla]]
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- [[fyz/Mechanika tekutin/Hydrostatický paradox|Hydrostatický paradox]]
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- [[fyz/Mechanika tekutin/Tekutiny|Tekutiny]]
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%% Zoottelkeeper: End of the autogenerated index file list %%
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# notes
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```ccard
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type: folder_brief_live
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folder: /
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noteOnly: true
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```
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%% Zoottelkeeper: Beginning of the autogenerated index file list %%
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- [[ang/ang|ang]]
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- [[cjl/cjl|cjl]]
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- [[data/data|data]]
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- [[dej/dej|dej]]
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- [[ech/ech|ech]]
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- [[ele/ele|ele]]
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- [[Excalidraw/Excalidraw|Excalidraw]]
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- [[fyz/fyz|fyz]]
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- [[har/har|har]]
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- [[kbb/kbb|kbb]]
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- [[mat/mat|mat]]
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- [[Misc/Misc|Misc]]
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- [[ONA/ONA|ONA]]
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- [[OSE/OSE|OSE]]
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- [[Osobnosti|Osobnosti]]
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- [[pdv/pdv|pdv]]
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- [[preamble.sty|preamble.sty]]
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- [[projects/projects|projects]]
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- [[psi/psi|psi]]
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- [[README|README]]
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- [[tek/tek|tek]]
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- [[učitelé/učitelé|učitelé]]
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%% Zoottelkeeper: End of the autogenerated index file list %%
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