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Physics: explore STEM content (page 11 of 27) · openstem

All fields Software Mathematics Physics Chemistry Biology Engineering Astronomy Environmental Other Physics Physics groups

Explore STEM Content

Search the community's STEM library — free to study, yours to make your own.

Physics

Mechanics, electromagnetism and quantum on openstem — flashcards, notes, quizzes, plots and sketches shared by the community. Study free, or clone anything into your library.

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Flashcards8 cards

State the first-order energy correction in time-independent perturbation theory for H = H₀ + λH'.1 / 8

E_n^(1) = ⟨n⁽⁰⁾|H'|n⁽⁰⁾⟩, the expectation value of the perturbation in the unperturbed eigenstate. It is simply the diagonal matrix element — no summation over other states is needed at first order.

Physics

Physics · L5 · Perturbation Theory & Scattering

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Physics · L5 · Perturbation Theory & Scattering

Plot1 plot · 2 params

Physics

Damped Oscillation: y = e^(−k·x)·sin(b·x)

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Damped Oscillation: y = e^(−k·x)·sin(b·x)

Flowchart9 objects

Physics

Physics · L1 · Mirrors & Reflections · flowchart

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Physics · L1 · Mirrors & Reflections · flowchart

Flowchart9 objects

Physics

Physics · L5 · Statistical Ensembles

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Physics · L5 · Statistical Ensembles

Collection4 items

01Physics · L4 · Waves & Optics — Core Concepts

02Physics · L4 · Wave mechanics: interference, diffraction, and standing waves

03Physics · L4 · Wave interference: constructive and destructive

+1 more

Physics

Physics · L4 · Waves & Optics

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Physics · L4 · Waves & Optics

Collection4 items

01Physics · L3 · Simple Harmonic Motion: Springs & Pendulums

02Physics · L3 · Simple Harmonic Motion: Springs & Pendulums

03Physics · L3 · Choosing the Right SHM Period Formula

+1 more

Physics

Physics · L3 · Simple Harmonic Motion: Springs & Pendulums

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Physics · L3 · Simple Harmonic Motion: Springs & Pendulums

Quiz6 questions

In the path integral formulation, the quantum amplitude between two points is:

AThe amplitude of the single classical path onlyBA sum over every possible path, each weighted by e^(iS/ħ)CIndependent of the action S entirelyDOnly defined for free particles

Physics

Physics · L5 · The Path Integral Formulation

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Physics · L5 · The Path Integral Formulation

Quiz4 questions

In tug of war, both teams pull exactly as hard as each other. What happens to the rope?

AIt moves toward the stronger teamBIt stays stillCIt moves toward both teams at onceDIt snaps in half

Physics

Physics · L1 · Balanced & Unbalanced Forces

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Physics · L1 · Balanced & Unbalanced Forces

Flashcards8 cards

What is density?1 / 8

Density is how much mass is packed into a given volume. Density = mass ÷ volume.

Physics

Physics · L2 · What Is Density?

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Physics · L2 · What Is Density?

Flowchart11 objects

Physics

Physics · L2 · Sound: Pitch, Loudness & Echoes · flowchart

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Physics · L2 · Sound: Pitch, Loudness & Echoes · flowchart

Flowchart9 objects

Physics

Physics · L2 · Introducing Ohm's Law · flowchart

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Physics · L2 · Introducing Ohm's Law · flowchart

Flowchart14 objects

Physics

Physics · L4 · Sound waves, intensity, and the Doppler effect · flowchart

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Physics · L4 · Sound waves, intensity, and the Doppler effect · flowchart

Flowchart20 objects

Physics

Physics · L3 · Solving a Projectile Motion Problem

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Physics · L3 · Solving a Projectile Motion Problem

Flashcards5 cards

What is energy?1 / 5

Energy is the ability to do work or cause change. Without energy, nothing can move, grow, or change.

Physics

Physics · L2 · Energy Forms

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Physics · L2 · Energy Forms

Quiz6 questions

In a series circuit, how many paths does electricity have to flow through?

AOnly oneBExactly twoCAs many as there are bulbsDIt depends on the battery

Physics

Physics · L2 · Series & Parallel Circuits

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Physics · L2 · Series & Parallel Circuits

Flowchart7 objects

Physics

Physics · L5 · From Path Integral to Classical Mechanics and to Statistical Mechanics

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Physics · L5 · From Path Integral to Classical Mechanics and to Statistical Mechanics

Flashcards8 cards

State Newton's law of universal gravitation.1 / 8

F = Gm₁m₂/r², directed along the line joining the two masses, always attractive. G = 6.674 × 10⁻¹¹ N·m²/kg² is the universal gravitational constant.

Physics

Physics · L4 · Gravitation & Orbital Mechanics

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Physics · L4 · Gravitation & Orbital Mechanics

Flowchart7 objects

Physics

Physics · L5 · Covariant Electrodynamics: The Electromagnetic Field Tensor · flowchart

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Physics · L5 · Covariant Electrodynamics: The Electromagnetic Field Tensor · flowchart

Collection4 items

01Physics · L2 · Center of Mass & Stability

02Physics · L2 · Center of Mass & Stability

03Physics · L2 · Why Some Objects Tip Over and Others Don't

+1 more

Physics

Physics · L2 · Center of Mass & Stability

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Physics · L2 · Center of Mass & Stability

Flowchart10 objects

Physics

Physics · L1 · Current Around a Complete Loop

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Physics · L1 · Current Around a Complete Loop

Note~218 words · 1 min

Three things, one equation Know any two and you can find the third. Rearranged: I = V ÷ R, and R = V ÷ I. The pattern to hold onto With resistance fixed, more voltage means more current. Push harder, more flows. In the first three rows the

Physics

Physics · L2 · Introducing Ohm's Law

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Physics · L2 · Introducing Ohm's Law

Quiz6 questions

This distance-time graph is a straight line through the origin. What does its gradient tell you, and what does the straightness tell you?

AThe gradient is the acceleration, and the straight line means the acceleration is increasingBThe gradient is the speed, and the straight line means the speed is constantCThe gradient is the total distance, and the straight line means the object is stationaryDThe gradient is the time taken, and the straight line means the object is speeding up

Physics

Physics · L3 · Reading Graphs — 6 Q

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Physics · L3 · Reading Graphs — 6 Q

Flowchart13 objects

Physics

Physics · L5 · Superconductivity: BCS Theory and the Meissner Effect · flowchart

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Physics · L5 · Superconductivity: BCS Theory and the Meissner Effect · flowchart

Collection4 items

01Physics · L1 · Simple Machines

02Physics · L1 · Simple Machines

03Physics · L1 · Choosing a Simple Machine

+1 more

Physics

Physics · L1 · Simple Machines

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Physics · L1 · Simple Machines

Note~366 words · 2 min

Charge that stays put Atoms carry positive charge in the nucleus and negative charge in the electrons around it. Normally they balance, so things are neutral. Rub two surfaces together and electrons move from one to the other. One ends up w

Physics

Physics · L2 · Static Electricity

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Physics · L2 · Static Electricity

Collection5 items

01Physics · L5 · Particle Physics

02Physics · L5 · Particle Physics

03Physics · L5 · The Standard Model: Fermions, Bosons, and Hadrons

+2 more

Physics

Physics · L5 · Particle Physics

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Physics · L5 · Particle Physics

Flowchart9 objects

Physics

Physics · L2 · Mechanical Advantage: Levers & Pulleys · flowchart

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Physics · L2 · Mechanical Advantage: Levers & Pulleys · flowchart

Flowchart11 objects

Physics

Physics · L3 · Finding the Force on a Current-Carrying Wire

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Physics · L3 · Finding the Force on a Current-Carrying Wire

Collection4 items

01Physics · L5 · Quantum Information — Entanglement & Bell's Theorem

02Physics · L5 · Quantum Information: Entanglement and Bell's Theorem

03Physics · L5 · Testing Bell's Inequality

+1 more

Physics

Physics · L5 · Quantum Information — Entanglement & Bell's Theorem

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Physics · L5 · Quantum Information — Entanglement & Bell's Theorem

Flashcards8 cards

Define capacitance and state its defining formula.1 / 8

C = Q/V, the ratio of stored charge to the potential difference across the capacitor. It is a geometric property of the conductor pair (and any dielectric between them) — independent of Q and V individually. SI unit: farad (F = C/V).

Physics

Physics · L4 · Capacitance & Dielectrics

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Physics · L4 · Capacitance & Dielectrics

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