2026-09-04 12:31:07: Physics 2

physics/Fluids/Fluids.md

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physics/Force and Translational Dynamics/Force and Translational Dynamics.md

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 "Forces arise from interactions between two objects or systems of objects. Use free body diagrams and motion models to analyze the effects of forces on systems. Translate between different representations of forces and motion, and use models to analyze how interactions cause change. Practice deriving equations from fundamental principles and use proportional reasoning to make predictions."
 

physics/Linear Momentum/Linear Momentum.md

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 Linear momentum: $$\vec p=m\vec v$$
 $\vec p$ is momentum in kg * m/s
 

physics/Lorentz force.md

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 force exerted on a charge in relation to a magnetic and electric field
 formula is 

physics/Oscillations/Oscillations.md

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-[[Physics]]
+[[physics]]

physics/Physics AP Exam Tips.md

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+# Constants
+* $R$: Ideal gas constant, 8.31 J/mol$*$k
+* $k_B$: Boltzmann constant, $1.38*10^{-23}$J/K
+# Notation
+* $V$ is volume (m^3)
+* $T$ is temperature (Kelvin usually)
+# Tips
 * Assume fluids are ideal unless stated otherwise.
 * Kelvin is usually used over Celsius

physics/Thermodynamics/Entropy and Second Law of Thermodynamics.md

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+[[Thermodynamics]]
+# Summary
+* Entropy describes energy's tendency to spread out and cause some of the energy to become useless.
+* Entropy decreases when energy is organized, increases when spread out.
+* Higher entropy means more useless energy.
+* Total entropy of an isolated system never decreases over time.
+* Entropy remains constant only in perfectly reversible processes (theoretical).
+* IRL, entropy always increases.

physics/Thermodynamics/First Law of Thermodynamics.md

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+[[Thermodynamics]]
+# Summary
+* First law: $\Delta U=Q+W$
+* Q is heat added W is work done
+* Internal energy $U$ is the sum of kinetic energy and potential energy. Ideal gas has no internal potential energy, so solely kinetic.
+* Ideal monatomic gas has formula: $U=\frac{3}{2}Nk_BT=\frac{3}{2}nRT$ 
+* Work done on gas by external pressure: $W=-P\Delta V$
+* Negative sign means expansion does negative work on gas.
+* On a PV graph, integrals are work done, and straight lines are isotherms.
+* Four special processes:
+	* Isovolumeric $W = 0$
+	* Isothermic $\Delta U = 0$ For an ideal gas
+	* Isobaric $W=-P\Delta V$
+	* Adiabatic $Q=0$

physics/Thermodynamics/Thermodynamics.md

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physics/Torque and Rotational Dynamics/Torque and Rotational Dynamics.md

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-[[Physics]]
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physics/Work Energy and Power/Work Energy and Power.md

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 WEaP
 

physics/constants.md

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-[[Physics]]
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physics/dynamics.md

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-[[Physics]]
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physics/quantum mechanics.md

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 "Quantum mechanics, also known as quantum physics, is the fundamental physical theory that describes the behavior of matter and of light; the behaviors it models typically occur at and below the scale of atoms, and have been described as peculiar and mysterious."