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Physics: explore STEM content (page 17 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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Flowchart7 objects

Physics

Physics · L5 · Nuclear Astrophysics: How Stars Build the Elements · flowchart

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Physics · L5 · Nuclear Astrophysics: How Stars Build the Elements · flowchart

Note~240 words · 1 min

Pull twice as hard, stretch twice as far Hooke's Law, and it holds for most springs as long as you don't overdo it. The spring constant is stiffness Measured in newtons per metre. Bigger k means you need more force per centimetre. Worked: k

Physics

Physics · L2 · Springs & Hooke's Law

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Physics · L2 · Springs & Hooke's Law

Flowchart13 objects

Physics

Physics · L5 · Testing Bell's Inequality

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Physics · L5 · Testing Bell's Inequality

Flashcards10 cards

What is a simple machine?1 / 10

A simple machine is a plain tool with no engine or motor that makes a job easier for you.

Physics

Physics · L1 · Simple Machines

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Physics · L1 · Simple Machines

Note~255 words · 1 min

Light bends when it changes material Light travels straight through air. Cross into water or glass and it changes speed, and that speed change makes the ray bend. That's refraction. Lenses: refraction on purpose A lens is curved transparent

Physics

Physics · L2 · Refraction & Lenses

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Physics · L2 · Refraction & Lenses

Flashcards7 cards

What is a light source?1 / 7

A light source is something that makes its own light, like the sun, a candle flame, or a glowing lightbulb.

Physics

Physics · L1 · Where Light Comes From: Sources vs Reflections

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Physics · L1 · Where Light Comes From: Sources vs Reflections

Collection4 items

01Physics · L1 · Magnifying Glasses & Simple Lenses

02Physics · L1 · Magnifying Glasses & Simple Lenses

03Physics · L1 · How a Magnifying Glass Makes Things Look Bigger

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Physics

Physics · L1 · Magnifying Glasses & Simple Lenses

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Physics · L1 · Magnifying Glasses & Simple Lenses

Flashcards8 cards

What is an echo?1 / 8

A sound wave that reflects off a surface — like a wall or cliff — and comes back to your ears a moment later.

Physics

Physics · L2 · Echoes, Sound Reflection & Sonar

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Physics · L2 · Echoes, Sound Reflection & Sonar

Flowchart5 objects

Physics

Physics · L5 · Phase Transitions & Critical Phenomena · flowchart

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Physics · L5 · Phase Transitions & Critical Phenomena · flowchart

Flowchart21 objects

Physics

Physics · L4 · Uranium-238 decay chain to stable lead-206

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Physics · L4 · Uranium-238 decay chain to stable lead-206

Note~341 words · 2 min

The shift you have to make Classical mechanics tells you where a particle is. Quantum mechanics tells you the probability of finding it there. That's the whole change, and everything else follows from it. Wave-particle duality de Broglie's

Physics

Physics · L4 · Introduction to quantum mechanics

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Physics · L4 · Introduction to quantum mechanics

Collection5 items

01Physics · L3 · Resistor Circuits

02Physics · L3 · Resistor Circuits

03Physics · L3 · Series or Parallel? Choosing the Formula

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Physics

Physics · L3 · Resistor Circuits

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Physics · L3 · Resistor Circuits

Flowchart11 objects

Physics

Physics · L5 · Phase Transitions and Critical Phenomena · flowchart

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Physics · L5 · Phase Transitions and Critical Phenomena · flowchart

Flowchart11 objects

Physics

Physics · L4 · From Newton's Law to Kepler's Laws

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Physics · L4 · From Newton's Law to Kepler's Laws

Collection4 items

01Physics · L5 · Plasma Physics — Debye Shielding & Plasma Oscillations

02Physics · L5 · Plasma Physics: Debye Shielding and Collective Behaviour

03Physics · L5 · Wave Propagation vs Reflection in a Plasma

+1 more

Physics

Physics · L5 · Plasma Physics — Debye Shielding & Plasma Oscillations

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Physics · L5 · Plasma Physics — Debye Shielding & Plasma Oscillations

Flashcards10 cards

A charged particle sits still inside a strong magnetic field. What magnetic force does it feel?1 / 10

Zero. A magnetic field exerts no force at all on a charge that isn't moving — that's a key difference from the electric force, which pushes on a charge whether it's moving or standing still.

Physics

Physics · L3 · Magnetic Force on Moving Charges

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Physics · L3 · Magnetic Force on Moving Charges

Note~251 words · 1 min

Pressure is force divided by area Spot it around the house Atmospheric pressure On Everest each breath carries far less oxygen, which is why climbers carry bottles. Why ears pop Underwater

Physics

Physics · L2 · Pressure: Atmospheric & Fluid

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Physics · L2 · Pressure: Atmospheric & Fluid

Quiz6 questions

What is required to induce a current in a loop of wire?

AAny magnetic field nearby, moving or notBA changing magnetic flux through the loopCA battery connected directly to the loopDThe loop must be made of a magnetic material

Physics

Physics · L3 · Electromagnetic Induction: Faraday's & Lenz's Laws

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Physics · L3 · Electromagnetic Induction: Faraday's & Lenz's Laws

Flowchart5 objects

Physics

Physics · L1 · Fast & Slow · flowchart

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Physics · L1 · Fast & Slow · flowchart

Note~237 words · 1 min

It isn't about weight A steel ship weighs as much as hundreds of elephants and floats. A small stone weighs almost nothing by comparison and sinks straight down. What dense means Dense means tightly packed for its size: heavy for how small

Physics

Physics · L1 · Floating & Density

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Physics · L1 · Floating & Density

Collection4 items

01Physics · L4 · Kinetic Theory of Gases

02Physics · L4 · Kinetic theory of gases

03Physics · L4 · From Molecular Motion to Gas Pressure

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Physics

Physics · L4 · Kinetic Theory of Gases

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Physics · L4 · Kinetic Theory of Gases

Flashcards8 cards

What does this equation calculate?1 / 8

The magnetic force on a current-carrying wire of length L, in a magnetic field of strength B, where θ is the angle between the wire and the field.

Physics

Physics · L3 · Magnetic Force on Current-Carrying Wires

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Physics · L3 · Magnetic Force on Current-Carrying Wires

Flashcards10 cards

As an ambulance drives toward you with its siren blaring, then passes and speeds away, what do you notice about the pitch of the siren?1 / 10

The pitch sounds higher than normal while it approaches, then drops noticeably lower the instant it passes and starts moving away. This is the Doppler effect — the siren's own emitted frequency never changes; only what you hear changes, because of the relative motion between you and the source.

Physics

Physics · L3 · The Doppler Effect

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Physics · L3 · The Doppler Effect

Note~169 words · 1 min

Kinetic energy, then the theorem The work-energy theorem ties that straight to work done: What the sign tells you Worked: pushing a cart from rest 2 kg cart, 10 N net force, 4 m of push. Final speed? Mass, force, distance. That's all it too

Physics

Physics · L3 · The Work-Energy Theorem

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Physics · L3 · The Work-Energy Theorem

Flashcards8 cards

Define the four-potential A^μ and give the SI expressions for E and B in terms of φ and A.1 / 8

The scalar potential φ and vector potential A combine into one four-vector. From them: E = −∇φ − ∂A/∂t and B = ∇×A. These are exactly the relations that make F^μν = ∂^μA^ν − ∂^νA^μ reproduce the correct E and B.

Physics

Physics · L5 · Covariant Electrodynamics — Four-Potential, Gauge, and Field Mixing

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Physics · L5 · Covariant Electrodynamics — Four-Potential, Gauge, and Field Mixing

Flashcards10 cards

Define the electromagnetic field tensor F^μν in terms of the four-potential A^μ.1 / 10

F^μν is the antisymmetrized four-gradient of the four-potential A^μ = (φ/c, A). Because it is built from a curl-like operation on A^μ, it is automatically antisymmetric: F^μν = −F^νμ.

Physics

Physics · L5 · Covariant Electrodynamics

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Physics · L5 · Covariant Electrodynamics

Collection4 items

01Physics · L1 · Fast & Slow

02Physics · L1 · Fast & Slow

03Physics · L1 · Slowest to Fastest

+1 more

Physics

Physics · L1 · Fast & Slow

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Physics · L1 · Fast & Slow

Flowchart17 objects

Physics

Physics · L4 · Geometric Optics: Lenses, Mirrors, and Ray Diagrams · flowchart

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Physics · L4 · Geometric Optics: Lenses, Mirrors, and Ray Diagrams · flowchart

Collection4 items

01Physics · L2 · Curved Mirrors

02Physics · L2 · Curved Mirrors

03Physics · L2 · Concave vs. Convex — What a Curved Mirror Shows You

+1 more

Physics

Physics · L2 · Curved Mirrors

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Physics · L2 · Curved Mirrors

Flashcards8 cards

What is a standing wave?1 / 8

A wave pattern formed when two identical waves travel in opposite directions and interfere, creating a pattern that appears to stay in place, alternating between fixed peaks and fixed still points.

Physics

Physics · L3 · Standing Waves & Resonance

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Physics · L3 · Standing Waves & Resonance

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