vault backup: 2026-08-17 09:49:11

.obsidian/workspace.json

@@ -118,9 +118,23 @@
               "icon": "lucide-file",
               "title": "Conservation of Energy"
             }
+          },
+          {
+            "id": "fd4f04ae3f91eb93",
+            "type": "leaf",
+            "state": {
+              "type": "markdown",
+              "state": {
+                "file": "physics/Work Energy and Power/Power.md",
+                "mode": "source",
+                "source": false
+              },
+              "icon": "lucide-file",
+              "title": "Power"
+            }
           }
         ],
-        "currentTab": 7
+        "currentTab": 8
       },
       {
         "id": "25da4f0a48a8e7cd",
@@ -304,20 +318,23 @@
       "obsidian-excalidraw-plugin:New drawing": false
     }
   },
-  "active": "713a2ea9096a5d46",
+  "active": "fd4f04ae3f91eb93",
   "lastOpenFiles": [
-    "physics/Work Energy and Power/Potential Energy.md",
-    "physics/Force and Translational Dynamics/Conservation of Energy.md",
     "physics/Work Energy and Power/Work.md",
-    "physics/Work Energy and Power/Translational Kinetic Energy.md",
     "physics/Work Energy and Power/Work Energy and Power.md",
+    "literacy/buzzwords.md",
+    "literacy/fallacies.md",
+    "literacy/literacy.md",
+    "physics/Work Energy and Power/Power.md",
+    "physics/Work Energy and Power/Potential Energy.md",
+    "physics/Work Energy and Power/Translational Kinetic Energy.md",
+    "physics/Force and Translational Dynamics/Conservation of Energy.md",
     "biology/Cell Structure and Function/Cell Structure and Function.md",
     "biology/Cell Structure and Function/Origins of Cell Compartmentalization.md",
     "biology/Chemistry of Life/structure of water and hydrogen bonding.md",
     "biology/Chemistry of Life/Macromolecules.md",
     "biology/Chemistry of Life/Lipids.md",
     "biology/Chemistry of Life/Carbohydrates.md",
-    "literacy/fallacies.md",
     "physics/Force and Translational Dynamics/Newton's Second Law.md",
     "physics/Force and Translational Dynamics/Newton's First Law.md",
     "physics/Force and Translational Dynamics/Newton's Third Law.md",
@@ -329,9 +346,6 @@
     "physics/physics.md",
     "physics/plancks constant.md",
     "physics/quantum mechanics.md",
-    "physics/thermal expansion.md",
-    "physics/Thermodynamics.md",
-    "physics/constants.md",
     "Assets/Pasted image 20260816081041.png",
     "physics/Work Energy and Power",
     "Assets/Pasted image 20260816073410.png",

literacy/buzzwords.md

@@ -19,4 +19,5 @@ hale - to compel to go / (archaic) to pull draw drag or hoist
 incongruence - out of place/absurd
 olfactory - part of sensory system used for smells
 nebulous - misty/foggy/mysterious
-umbra - shadowy part
+umbra - dark area
+exergy - useful energy

physics/Work Energy and Power/Potential Energy.md

@@ -1,7 +1,7 @@
 [[Work Energy and Power]]
 megumi energy
 
-# SUMMARY
+# Summary
 * potential energy refers to multiple objects in a system affecting each other with conservative forces
 * In MY words, potential energy is j stored kinetic energy that something has due to its surroundings, and it cashes it out and converts the PE to KE.
 * Scalar
@@ -10,7 +10,7 @@ megumi energy
 * Gravitational potential energy between 2 spherical masses: $U_g=-G\frac{m_1m_2}{r}$. Near surface approximation: $\Delta U_g=mg\Delta y$
 * For a system with more than 2 objects, potential energy is sum of energy of every pair.
 
-## Zero Potential Energy Definition
+# Zero Potential Energy Definition
 * Can define zero PE as any convenient reference point
 * For gravitational PE, a common ref point is ground level.
 * Springs equilibrium is the natural zero PE point.

physics/Work Energy and Power/Power.md

@@ -0,0 +1,24 @@
+[[Work Energy and Power]]
+
+Power is how fast energy moves or changes form.
+
+# Summary
+* SI Unit is Watts (W), where 1 W = 1J/s
+* Average power is energy change over time: $P_{avg}=\frac{\Delta E}{\Delta t}$. Work changes energy so $P_{avg}=\frac{W}{\Delta t}$
+* Instantaneous power for a constant force: $P_{inst}=F_{||}v=Fv\cos \theta$ using only force component parallel to velocity.
+* Sign of power tells direction, positive means energy added negative means energy removed.
+* When an object moves at a constant speed, energy is zero.
+
+# Average Power Calculation
+$$P_{avg}=\frac{\Delta E}{\Delta t}$$
+Examples:
+* 60 watt light bulb transfers 60 joules into light and heat.
+* 1500 watt hair drier running for 5 minutes transfers 1500 * 300 watts.
+* Solar panel generating 500 watts per second stores 500 joules to be used later.
+
+# Power as Work Rate
+$$P_{avg}=\frac{W}{\Delta t}$$
+Power can be calculated by dividing work by time taken.
+
+# Instantaneous Force from Power
+$$P_{inst}=F_{||}v=Fv\cos \theta$$

physics/Work Energy and Power/Work.md

@@ -7,7 +7,7 @@
 * Conservative forces do path independent work that is zero in a full loop and stays the same no matter what path is taken to the endpoint (e.g. gravity) while non-conservative forces care about the path taken (e.g. air resistance).
 * Net work = $\Delta K = \Sigma W_i$
 
-## Conservative vs Non Conservative
+# Conservative vs Non Conservative
 * Potential energy is conservative only
 * examples of conservative are gravity and spring
 * Conservative essentially means the work done only changes mechanical energy