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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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Physics: explore STEM content (page 14 of 27) · openstem

Flowchart9 objects

Physics

Physics · L1 · Light Bounces Off a Mirror

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Physics · L1 · Light Bounces Off a Mirror

Flashcards10 cards

What is a concave mirror?1 / 10

A mirror that curves inward, like the inside of a spoon or a satellite dish. It reflects light off a bowl-shaped surface instead of a flat one.

Physics

Physics · L2 · Curved Mirrors

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Physics · L2 · Curved Mirrors

Plot1 plot · 1 param

Physics

Physics · L2 · Current vs Voltage (Fixed Resistance)

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Physics · L2 · Current vs Voltage (Fixed Resistance)

Collection4 items

01Physics · L3 · Torque & Rotational Equilibrium

02Physics · L3 · Torque & Rotational Equilibrium

03Physics · L3 · Checking Rotational Equilibrium on a See-Saw

+1 more

Physics

Physics · L3 · Torque & Rotational Equilibrium

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Physics · L3 · Torque & Rotational Equilibrium

Flowchart11 objects

Physics

Physics · L1 · How Wind Fills a Sail

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Physics · L1 · How Wind Fills a Sail

Collection6 items

01Physics · L4 · Oscillations & Resonance

02Physics · L4 · Oscillations & Resonance

03Physics · L4 · Oscillations: SHM, Damping, and Resonance

+3 more

Physics

Physics · L4 · Oscillations & Resonance

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Physics · L4 · Oscillations & Resonance

Flowchart7 objects

Physics

Physics · L3 · Magnetic Force on Moving Charges · flowchart

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Physics · L3 · Magnetic Force on Moving Charges · flowchart

Quiz6 questions

What is friction?

AA rubbing force that slows down sliding thingsBA force that only exists in spaceCA kind of lightDA force that speeds things up

Physics

Physics · L1 · Friction: Why Things Slow Down

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Physics · L1 · Friction: Why Things Slow Down

Quiz6 questions

According to the continuity equation, what happens to a fluid's speed when a pipe narrows?

AThe speed decreasesBThe speed increasesCThe speed stays exactly the sameDThe fluid stops flowing entirely

Physics

Physics · L3 · Fluid Dynamics: Continuity & Bernoulli's Principle

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Physics · L3 · Fluid Dynamics: Continuity & Bernoulli's Principle

Flowchart11 objects

Physics

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

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

Note~278 words · 1 min

Why heat makes things bigger Almost every material takes up slightly more space when heated. Heating makes its particles vibrate or move more vigorously, which pushes their average spacing apart a little. Across billions of particles, that

Physics

Physics · L2 · Thermal Expansion

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Physics · L2 · Thermal Expansion

Quiz6 questions

What is a light source?

ASomething that makes its own lightBAnything you can seeCAnything that is bright coloredDOnly the Sun

Physics

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

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

Quiz3 questions

In the canonical ensemble, the mean energy ⟨E⟩ is expressed in terms of the partition function Z as:

A⟨E⟩ = ∂ ln Z/∂βB⟨E⟩ = −k_B T ln ZC⟨E⟩ = ln Z / βD⟨E⟩ = −∂ ln Z/∂β

Physics

Physics · L5 · Statistical Mechanics

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Physics · L5 · Statistical Mechanics

Flowchart17 objects

Physics

Physics · L4 · Nuclear physics: radioactivity, decay, and binding energy · flowchart

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Physics · L4 · Nuclear physics: radioactivity, decay, and binding energy · flowchart

Flashcards10 cards

What makes a magnet a 'permanent' magnet?1 / 10

A permanent magnet, like a bar magnet, is magnetic all on its own — no electricity needed. It keeps its magnetic pull all the time, unlike an electromagnet that only works when current flows through it.

Physics

Physics · L2 · Permanent Magnets & Field Lines

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Physics · L2 · Permanent Magnets & Field Lines

Flowchart11 objects

Physics

Physics · L2 · Series & Parallel Circuits · flowchart

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Physics · L2 · Series & Parallel Circuits · flowchart

Quiz6 questions

What creates the magnetic field in an electromagnet?

AThe iron nail alone, even without currentBElectric current flowing through the coiled wireCThe battery's plastic casingDFriction between the wire and the nail

Physics

Physics · L2 · Magnetism & Electromagnets

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Physics · L2 · Magnetism & Electromagnets

Flashcards10 cards

In tug of war, both teams pull equally hard. Does the rope move?1 / 10

No, the rope stays still. The two pulls are equally strong but point in opposite directions, so they cancel out.

Physics

Physics · L1 · Balanced & Unbalanced Forces

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Physics · L1 · Balanced & Unbalanced Forces

Note~274 words · 1 min

Current makes magnetism too Permanent magnets aren't the only source. Any current flowing in a wire creates a magnetic field around it. You can't see it, but a compass placed nearby will swing to line up with it. One straight wire gives a w

Physics

Physics · L2 · Magnetism & Electromagnets

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Physics · L2 · Magnetism & Electromagnets

Quiz6 questions

A block has a mass of 30 g and a volume of 10 cm³. What is its density?

A0.3 g/cm³B3 g/cm³C300 g/cm³D20 g/cm³

Physics

Physics · L2 · Density & Buoyancy

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Physics · L2 · Density & Buoyancy

Flowchart5 objects

Physics

Physics · L2 · Curved Mirrors · flowchart

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Physics · L2 · Curved Mirrors · flowchart

Collection4 items

01Physics · L1 · Static Electricity: Balloons & Hair

02Physics · L1 · Static Electricity: Balloons & Hair

03Physics · L1 · What Happens When You Rub a Balloon

+1 more

Physics

Physics · L1 · Static Electricity: Balloons & Hair

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Physics · L1 · Static Electricity: Balloons & Hair

Note~356 words · 2 min

Why AC needs more than Ohm's law An AC source pushes a voltage that swings sinusoidally. A resistor doesn't care. A capacitor and an inductor care a great deal, and they care in opposite directions. That φ is the whole complication: current

Physics

Physics · L4 · AC Circuits: Impedance and RLC Resonance

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Physics · L4 · AC Circuits: Impedance and RLC Resonance

Flashcards5 cards

What is a push?1 / 5

A push is a force that moves something away from you. You push a door to open it.

Physics

Physics · L1 · Push and Pull

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Physics · L1 · Push and Pull

Flashcards8 cards

A 2.0 kg point mass sits 0.50 m from a pivot. A tangential force of 6.0 N is applied at that point, perpendicular to the arm. Find the torque and the resulting angular acceleration.1 / 8

τ = rF sin 90° = (0.50 m)(6.0 N) = 3.0 N·m. I = mr² = (2.0 kg)(0.50 m)² = 0.50 kg·m². From τ = Iα: α = τ/I = 3.0/0.50 = 6.0 rad/s².

Physics

Physics · L4 · Rotational Dynamics

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Physics · L4 · Rotational Dynamics

Note~211 words · 1 min

Momentum needs both mass and speed It measures how hard something is to stop. Comparing real objects A crawling truck beats a hurled tennis ball. Mass can outweigh a big speed difference. Collisions depend on the mass ratio Why crashes hurt

Physics

Physics · L2 · Momentum & Collisions

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Physics · L2 · Momentum & Collisions

Quiz3 questions

You open a drawer. Is that a push or a pull?

APushBPullCBoth at onceDNeither

Physics

Physics · L1 · Push, Pull, and Magnets

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Physics · L1 · Push, Pull, and Magnets

Flowchart7 objects

Physics

Physics · L2 · Pressure: Atmospheric & Fluid · flowchart

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Physics · L2 · Pressure: Atmospheric & Fluid · flowchart

Note~412 words · 2 min

Two equations run most of fluid flow Use them in that order, every time. Geometry fixes the speed, then Bernoulli converts that speed into a pressure. Continuity That's pure mass conservation. It says nothing about pressure or viscosity and

Physics

Physics · L4 · Fluid Mechanics: Bernoulli's equation, continuity, and viscous flow

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Physics · L4 · Fluid Mechanics: Bernoulli's equation, continuity, and viscous flow

Flashcards7 cards

A passenger lurches forward when a bus suddenly stops. Which law explains this?1 / 7

The First Law. The passenger's body was moving with the bus and tends to keep moving forward, even though the bus itself has stopped.

Physics

Physics · L2 · Newton's Three Laws

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Physics · L2 · Newton's Three Laws

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