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Physics: explore STEM content (page 24 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.

Content Groups1

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Flowchart11 objects

Physics

Physics · L1 · Solids, Liquids & Gases · flowchart

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Physics · L1 · Solids, Liquids & Gases · flowchart

Flowchart7 objects

Physics

Physics · L4 · Heat Added vs Temperature for a Heated Solid Turning to Liquid

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Physics · L4 · Heat Added vs Temperature for a Heated Solid Turning to Liquid

Note~142 words · 1 min

Light travels in straight lines Block it with something solid and a dark patch appears behind: a shadow. Shadows change through the day Try it: hold your hand in front of a torch. The dark shape on the wall is exactly where your hand stoppe

Physics

Physics · L1 · Light and Shadow

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Physics · L1 · Light and Shadow

Flashcards10 cards

Is a rock a solid, a liquid, or a gas?1 / 10

A solid. It keeps its own shape — a rock stays a rock, whether it sits on a table or in your hand.

Physics

Physics · L1 · Solids, Liquids & Gases

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Physics · L1 · Solids, Liquids & Gases

Flashcards11 cards

State Coulomb's law.1 / 11

F = k|q₁q₂|/r², where k = 1/(4πε₀) ≈ 8.99 × 10⁹ N·m²/C². Force is along the line joining the charges: attractive for opposite charges, repulsive for like charges.

Physics

Physics · L4 · Electrostatics — Charge, Field & Potential

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Physics · L4 · Electrostatics — Charge, Field & Potential

Flowchart11 objects

Physics

Physics · L1 · How Sound Travels

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Physics · L1 · How Sound Travels

Collection5 items

01Physics · L5 · Condensed Matter Physics

02Physics · L5 · Condensed Matter Physics — Doping & the p–n Junction

03Physics · L5 · Condensed Matter Physics: Band Theory & Semiconductors

+2 more

Physics

Physics · L5 · Condensed Matter Physics

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Physics · L5 · Condensed Matter Physics

Quiz6 questions

Which formula correctly gives the gravitational force between two masses?

AF = G·m₁·m₂/r²BF = G·m₁·m₂·r²CF = G·(m₁ + m₂)/rDF = G/(m₁·m₂·r)

Physics

Physics · L3 · Universal Gravitation

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Physics · L3 · Universal Gravitation

Note~387 words · 2 min

What makes motion simple harmonic One condition: the restoring force pulling the object back is proportional to how far it's been displaced. A spring obeying Hooke's law does this exactly. A pendulum does it approximately, and only for smal

Physics

Physics · L3 · Simple Harmonic Motion: Springs & Pendulums

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Physics · L3 · Simple Harmonic Motion: Springs & Pendulums

Flashcards9 cards

What is gravity?1 / 9

Gravity is an invisible force that pulls things down toward the Earth. It is why things fall instead of floating away.

Physics

Physics · L1 · Gravity & Falling

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Physics · L1 · Gravity & Falling

Note~355 words · 2 min

This force ignores charges that sit still An electric force acts on a charge whether it's parked or racing. A magnetic force is fussier: no motion, no force, however strong the field. Direction: the right-hand rule F comes out perpendicular

Physics

Physics · L3 · Magnetic Force on Moving Charges

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Physics · L3 · Magnetic Force on Moving Charges

Flowchart9 objects

Physics

Physics · L2 · Pendulums & Periodic Motion · flowchart

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Physics · L2 · Pendulums & Periodic Motion · flowchart

Note~414 words · 2 min

One assumption, one metric The cosmological principle: on large enough scales the universe is homogeneous (same everywhere) and isotropic (same in every direction). That single assumption forces the metric into one form. Everything dynamic

Physics

Physics · L5 · Cosmology: the Friedmann Equations and the Expanding Universe

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Physics · L5 · Cosmology: the Friedmann Equations and the Expanding Universe

Flowchart5 objects

Physics

Physics · L1 · Simple Machines · flowchart

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Physics · L1 · Simple Machines · flowchart

Flowchart9 objects

Physics

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

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

Note~228 words · 1 min

Every sound starts with something shaking A drum skin, a guitar string, your vocal cords, a speaker cone. Something vibrates, and two separate things about that vibration decide what you hear. Loud or quiet Hit a drum hard and the skin shak

Physics

Physics · L1 · Sound & Music

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Physics · L1 · Sound & Music

Flowchart19 objects

Physics

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

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

Flowchart7 objects

Physics

Physics · L5 · Cosmology: the Friedmann Equations and the Expanding Universe · flowchart

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Physics · L5 · Cosmology: the Friedmann Equations and the Expanding Universe · flowchart

Collection5 items

01Physics · L3 · Reflection & Refraction

02Physics · L3 · Snell's Law Practice

03Physics · L3 · Reflection, Refraction & Snell's Law

+2 more

Physics

Physics · L3 · Reflection & Refraction

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Physics · L3 · Reflection & Refraction

Flashcards11 cards

What is a trajectory?1 / 11

A trajectory is the curved path a thrown or launched object follows through the air — like the arc a basketball traces on its way to the hoop.

Physics

Physics · L2 · Projectile Motion Basics

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Physics · L2 · Projectile Motion Basics

Collection6 items

01Simple Harmonic Motion: y = A·sin(ω·x)

02Damped Oscillation: y = e^(−k·x)·sin(b·x)

03Projectile Trajectory: y = x·tan(a) − x²/40

+3 more

Physics

Physics · L3 · Physics in Motion

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Physics · L3 · Physics in Motion

Note~286 words · 1 min

Two conservation laws are enough However tangled the circuit, charge is conserved at every junction and energy is conserved around every loop. Those two facts solve all of it. Series and parallel RC charging Put a resistor, a capacitor and

Physics

Physics · L4 · DC circuits: Kirchhoff's laws and RC transients

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Physics · L4 · DC circuits: Kirchhoff's laws and RC transients

Flashcards8 cards

What defines an elastic collision?1 / 8

Both momentum AND total kinetic energy are conserved. The objects bounce apart rather than sticking, and no kinetic energy is converted to heat, sound, or deformation.

Physics