vault backup: 2023-02-15 14:05:39

notes/.obsidian/graph.json

@@ -95,6 +95,6 @@
   "repelStrength": 9.83333333333333,
   "linkStrength": 0.65,
   "linkDistance": 134,
-  "scale": 0.20886368800677915,
+  "scale": 0.1446372775858317,
   "close": false
 }

notes/.obsidian/plugins/obsidian-activity-history/data.json

@@ -12,8 +12,8 @@
   "checkpointList": [
     {
       "path": "/",
-      "date": "2023-02-07",
-      "size": 964283
+      "date": "2023-02-15",
+      "size": 968811
     }
   ],
   "activityHistory": [
@@ -1079,6 +1079,22 @@
         {
           "date": "2023-02-07",
           "value": 1308
+        },
+        {
+          "date": "2023-02-08",
+          "value": 37
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+        {
+          "date": "2023-02-09",
+          "value": 10
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+        {
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+          "value": 1559
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+        {
+          "date": "2023-02-15",
+          "value": 3062
         }
       ]
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notes/.obsidian/plugins/various-complements/data.json

@@ -55,14 +55,6 @@
         }
       }
     },
-    "mat/geometrie": {
-      "mat/geometrie": {
-        "frontMatter": {
-          "count": 1,
-          "lastUpdated": 1673519112200
-        }
-      }
-    },
     "plynu": {
       "plynu": {
         "currentFile": {
@@ -158,6 +150,14 @@
           "lastUpdated": 1674632664293
         }
       }
+    },
+    "teplo": {
+      "teplo": {
+        "currentFile": {
+          "count": 1,
+          "lastUpdated": 1676372910354
+        }
+      }
     }
   }
 }

notes/.obsidian/workspace.json

@@ -4,15 +4,19 @@
     "type": "split",
     "children": [
       {
-        "id": "817f519095997e5f",
+        "id": "bff99b47cce9d1cd",
         "type": "tabs",
         "children": [
           {
-            "id": "a484175f0886a564",
+            "id": "aabbc9ef4eb756f1",
             "type": "leaf",
             "state": {
-              "type": "empty",
-              "state": {}
+              "type": "markdown",
+              "state": {
+                "file": "mat/Funkce/Goniometrické funkce.md",
+                "mode": "source",
+                "source": false
+              }
             }
           }
         ]
@@ -44,7 +48,7 @@
             "state": {
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               "state": {
-                "query": "osob",
+                "query": "matice",
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                 "explainSearch": false,
                 "collapseAll": false,
@@ -73,6 +77,7 @@
             "state": {
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+                "file": "mat/Funkce/Goniometrické funkce.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -89,6 +94,7 @@
             "state": {
               "type": "outgoing-link",
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+                "file": "mat/Funkce/Goniometrické funkce.md",
                 "linksCollapsed": false,
                 "unlinkedCollapsed": true
               }
@@ -134,7 +140,9 @@
             "type": "leaf",
             "state": {
               "type": "outline",
-              "state": {}
+              "state": {
+                "file": "mat/Funkce/Goniometrické funkce.md"
+              }
             }
           },
           {
@@ -208,17 +216,17 @@
       "breadcrumbs:Breadcrumbs Visualisation": false
     }
   },
-  "active": "a484175f0886a564",
+  "active": "aabbc9ef4eb756f1",
   "lastOpenFiles": [
-    "kbb/tools/arp-scan.md",
-    "kbb/tools/aircrack-ng.md",
-    "kbb/tools/john.md",
-    "kbb/tools/tools.md",
-    "kbb/tools/SQLMap.md",
-    "kbb/tools/nmap.md",
-    "kbb/tools/arpspoof.md",
-    "kbb/kbb.md",
-    "mat/Funkce/Goniometrické funkce.md",
-    "mat/mat.md"
+    "mat/Funkce/Tangens.md",
+    "mat/Funkce/Příklady.md",
+    "mat/Funkce/Sinus.md",
+    "mat/Funkce/Cotangens.md",
+    "mat/Funkce/Cosinus.md",
+    "dej/dej.md",
+    "dej/moderní/komunismus/Untitled.md",
+    "fyz/fyz.md",
+    "cjl/cjl.md",
+    "ang/Essay - Description of our school.md"
   ]
 }

notes/ang/Essay - Description of our school.md

@@ -0,0 +1,5 @@
+# Essay - Description of our school
+
+Our school is a large four story building located in the middle of Prague in Czech Republic. It is an older building, as the school was originally opened in 1901. It has 2 wings, a so-called dark and light corridors, as well as a courtyard with parking for teachers.
+The school has a lot of equipment related to IT and for making smaller electrical projects (like a light controller), including some industrial machinery for such projects, like a CNC, laser for cutting and engraving or 3D printers. There are many classrooms full of computers for different classes - there are multiple for teaching programming, one specialized for cybersecurity (called the Cybernetic Polygon), multiple classrooms for 3D object creation (both for audiovisual results as well as for 3D printing), one for robotics (lego, arduino, etc) and even one for virtual reality, provided by a startup that originated at the school.
+The school also has “Preslova Media House”, that create a school newspaper, as well as make recordings of various events. Recently, they managed the whole media presence of one of the biggest Prague school events, “Pragensis school”, where they recorded the event, but also managed advertisements, social media accounts and more.

notes/ang/ang.md

@@ -10,6 +10,7 @@ type: folder_brief_live
 imagePrefix: 'data/'
 ```
 %% Zoottelkeeper: Beginning of the autogenerated index file list  %%
+-  [[ang/Essay - Description of our school|Essay - Description of our school]]
 -  [[ang/fun|fun]]
 -  [[ang/listening|listening]]
 -  [[ang/slovesa|slovesa]]

notes/fyz/Mechanika tekutin/Termodynamika/Kruhovy dej.md

@@ -0,0 +1,50 @@
+# Kruhovy dej
+
+- cyklicky
+- dej pri kterem je konecny stav totozny s puvodnim stavem
+
+Plyn uzavreny ve valci s pohyblivym pistem muze konat praci pouze pri zvetsovani objemu.
+Prace plynu ma ohranicenou velikost
+Vrati-li se plyn do puvodniho stavu, muze opet konat praci.
+
+![](Pasted%20image%2020230214115733.png)
+
+![](Pasted%20image%2020230214120718.png)
+
+AB: izofanicky $W_1’=p\Delta V$
+$W_1'=0.5*10^6*4*10^{-3}$
+$W_1'=2000J$
+
+BC: izochoricky, prace se nekona, odevzdava teplo
+CD: izofanicky, prijima teplo 
+$W_2=p\Delta V$
+$W_2=0.1*10^6*4*10^{-3}$
+$W_2=400J$
+
+DA: izochoricky, prijima teplo, prace se nekona
+
+Celkem
+$W'=W_1'+W_2'=2kJ-0.4kJ=1.6kJ$
+$\Delta U=0J$
+
+Vykonaná práce je rovna obsahu obkresleného grafem.
+
+---
+
+Plyn přijal od ohřívače během jednoho cyklu tepli $7MJ$ a odevzdal chladiči teplo $3MJ$.
+Jakou práci při tom vykonal?
+Jaká je účinnost tohoto cyklu?
+
+$Q_1=7MJ$
+$Q_2=3MJ$
+
+$W'=Q_1-Q_2$
+$W'=4MJ$
+
+$\eta=\frac{W'}{Q_1}=\frac47$
+
+---
+
+## Tepelne motory
+
+$\eta\le\eta_{\max}=\frac{T_1-T_2}{T_1}=1-\frac{T_2}{T_1}$

notes/fyz/Mechanika tekutin/Termodynamika/Termodynamika.md

@@ -9,6 +9,7 @@ $T=273K$ … $t=0\degree C$
 %% Zoottelkeeper: Beginning of the autogenerated index file list  %%
 -  [[fyz/Mechanika tekutin/Termodynamika/Celsiova teplotní stupnice|Celsiova teplotní stupnice]]
 -  [[fyz/Mechanika tekutin/Termodynamika/Ideální plyn|Ideální plyn]]
+-  [[fyz/Mechanika tekutin/Termodynamika/Kruhovy dej|Kruhovy dej]]
 -  [[fyz/Mechanika tekutin/Termodynamika/Pokus - Měření účinnosti varné konvice|Pokus - Měření účinnosti varné konvice]]
 -  [[fyz/Mechanika tekutin/Termodynamika/První termodynamický zákon|První termodynamický zákon]]
 -  [[fyz/Mechanika tekutin/Termodynamika/Tepelné děje Ideálního plynu|Tepelné děje Ideálního plynu]]

notes/har/Zvukova karta.md

@@ -0,0 +1,11 @@
+# Zvukova karta
+- co dela zvukova karta, k cemu slouzi
+- jakym zpusobem funguje digitalizace zvuku
+- na jakem principu funguje reproduktor
+- dulezite parametry u reproduktoru
+- podle jakych parametru by jste si vybrali sluchatka
+- jake tri druhy mikrofonu znate
+- kde/pro co vyuzijete dynamicky mikrofon
+- kde najdete elektronove mikrofony
+- k cemu slouzi smer mikrofonu
+- jake parametry mikrofonu urcujeme

notes/har/har.md

@@ -24,4 +24,5 @@ imagePrefix: 'data/'
 -  [[har/USB|USB]]
 -  [[har/WOL|WOL]]
 -  [[har/Základní deska|Základní deska]]
+-  [[har/Zvukova karta|Zvukova karta]]
 %% Zoottelkeeper: End of the autogenerated index file list  %%

notes/mat/Funkce/Goniometrické funkce.md

@@ -8,6 +8,8 @@ $\cos\alpha=\frac{b}c$ ($\sin\beta=\frac{a}c$)
 $\tg\alpha=\frac{a}b$
 $\cotg\alpha=\frac{b}a$
 
+![](Pasted%20image%2020230215114031.png)
+
 ---
 
 V pravoúhlem $\triangle ABC$  ($C$): $\beta=38\degree$; $a=7cm$, ostatní úhly a strany?

notes/mat/Funkce/Tangens.md

@@ -7,4 +7,87 @@ tags:
 $\DeclareMathOperator{\tg}{tg}\DeclareMathOperator{\cotg}{cotg}$
 $\tg \alpha$
 Protilehlá strana ku přilehlé straně v pravoúhlém trojúhelníku.
-Převrácená hodnota [$\cotg \alpha$](./Cotangens.md) ($\frac{1}{\cotg \alpha}$).
+Převrácená hodnota [$\cotg \alpha$](./Cotangens.md) ($\frac{1}{\cotg \alpha}$).
+
+> [!SENTENCE]
+> Funkcí **tangens** se nazývá funkce daná vztahem $$y=\frac{\sin x}{\cos x}$$
+
+## Definiční obor
+
+$D_{\sin}=\mathbb{R}$
+$D_{\cos}=\mathbb{R}$
+
+$\tg x = \frac{\sin x}{\cos x}$
+$\cos x\ne0$
+
+$x\ne\frac\pi2+k\pi,k\in\mathbb{Z}$
+
+$\tan(-x):\frac{\sin(-x)}{\cos(-x)}=\frac{-\sin x}{\cos x}=-\tan x$
+
+perioda $\tan$ ke $k\pi$ (každá půl otáčka).
+
+$\tan(x+k\pi)=\tan x$
+![](Pasted%20image%2020230215110903.png)
+
+![](Pasted%20image%2020230215111050.png)
+
+ve 3. kv. je $\frac--=+$
+
+---
+
+$x=\frac{\pi}4=45\degree$
+$\sin x=\frac{\sqrt2}2$
+$\cos x=\frac{\sqrt2}2$
+$\tg x=\frac{\sin x}{\cos x}=\frac{\frac{\sqrt2}2}{\frac{\sqrt2}2}=1$
+$\cotg x=\frac{\cos x}{\sin x}=\frac{\frac{\sqrt2}2}{\frac{\sqrt2}2}=1$
+
+---
+
+$x=-30\degree\approx330\degree$
+$\sin x=-\frac12$
+$\cos x=-\frac{\sqrt3}2$
+
+$\tg x=\frac{\sin x}{\cos x}=\frac{-\frac12}{-\frac{\sqrt3}2}=\frac{2}{2\sqrt3}$
+$\cotg x=\frac{\cos x}{\sin x}=\frac{-\frac{\sqrt3}2}{-\frac12}=\frac{2\sqrt3}2$
+
+---
+
+$x=780\degree\approx60\degree$
+
+$\sin x=\frac{\sqrt3}2$
+$\cos x=\frac12$
+
+$\tg x=\frac{\sin x}{\cos x}=\frac{\frac{\sqrt3}2}{\frac12}=\frac{2\sqrt3}2$
+$\cotg x=\frac{\cos x}{\sin x}=\frac{\frac12}{\frac{\sqrt3}2}=\frac2{2\sqrt3}$
+
+---
+
+$x=-315\degree\approx45\degree$
+
+$\sin x=\frac{\sqrt2}2$
+$\cos x=\frac{\sqrt2}2$
+
+$\tg x=\cotg x=1$
+
+---
+
+
+$$a^2*\sin\frac{\pi}2+b^2*\cos0+2ab*\cos\pi$$
+$a^2*1+b^2*1+2ab*(-1)$
+$(a-b)(a-b)$
+
+
+---
+
+$$3\cos\frac\pi2-4\sin\frac32\pi+8\tg \pi$$
+
+$3*1-4*(-1)+8*\frac01$
+$3+4+0$
+$7$
+
+
+---
+
+$$2\cos\pi+6\cotg\frac32\pi-5\sin2\pi$$
+
+$2*0+6$

notes/mat/Rovnice/Matice.md

@@ -2,7 +2,6 @@
 tags: [mat, mat/rovnice ]
 ---
 # Matice
-s# Matice
 Slouží k řešení [Soustavy rovnic](Soustavy%20rovnic.md).
 
 Například: