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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 22 of 27) · openstem

Flashcards12 cards

What does it mean for light to be polarized?1 / 12

Light is a transverse electromagnetic wave — its electric field oscillates perpendicular to the direction of travel. In unpolarized light (e.g. sunlight), the field oscillates in every direction perpendicular to propagation, randomly and rapidly. Polarized light has its electric field confined to a single, fixed plane.

Physics

Physics · L4 · Polarization & Diffraction

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Physics · L4 · Polarization & Diffraction

Flowchart9 objects

Physics

Physics · L2 · Magnetic Field Lines & Earth's Magnetism · flowchart

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Physics · L2 · Magnetic Field Lines & Earth's Magnetism · flowchart

Flowchart7 objects

Physics

Physics · L2 · More Voltage, More Current

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Physics · L2 · More Voltage, More Current

Note~454 words · 2 min

What chaos actually means Three conditions together: aperiodic long-term behaviour, bounded trajectories, and sensitive dependence on initial conditions. Lorenz found this by rounding a number in a toy weather model and getting completely d

Physics

Physics · L5 · Nonlinear Dynamics and Chaos

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Physics · L5 · Nonlinear Dynamics and Chaos

Flashcards12 cards

State Gauss's law for electricity, and what it says physically.1 / 12

∮ E · dA = Q_enc/ε₀. The total electric flux through any closed surface is proportional to the enclosed charge. Physically: electric field lines start on positive charges and end on negative charges — charge is the source of E.

Physics

Physics · L4 · Maxwell's Equations

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Physics · L4 · Maxwell's Equations

Flowchart7 objects

Physics

Physics · L2 · Curved Mirrors · flowchart

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Physics · L2 · Curved Mirrors · flowchart

Quiz6 questions

What two things does an object's momentum depend on?

AIts color and shapeBIts mass and its speedCIts temperature and its materialDOnly its speed

Physics

Physics · L2 · Momentum & Collisions

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Physics · L2 · Momentum & Collisions

Note~235 words · 1 min

Heat always flows hot to cold Wherever there's a temperature difference, heat moves until it evens out. There are exactly three routes. Conduction: particle to particle Metals conduct well because their electrons move freely. Wood and air c

Physics

Physics · L2 · Heat Transfer: Conduction, Convection, and Radiation

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Physics · L2 · Heat Transfer: Conduction, Convection, and Radiation

Collection4 items

01Physics · L3 · The Doppler Effect

02Physics · L3 · The Doppler Effect: Why a Passing Siren Changes Pitch

03Physics · L3 · Reading a Doppler Shift Scenario

+1 more

Physics

Physics · L3 · The Doppler Effect

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Physics · L3 · The Doppler Effect

Flashcards8 cards

What does this equation, the continuity equation, describe?1 / 8

For a fluid flowing through a pipe, the cross-sectional area (A) times the flow speed (v) stays constant — so where the pipe narrows, the fluid speeds up.

Physics

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

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

Note~356 words · 2 min

Torque: force, but for spinning Force changes how fast something moves in a line. Torque changes how fast it spins. Where and at what angle you push matters as much as how hard. Moment of inertia: rotational mass I plays the role mass plays

Physics

Physics · L4 · Rotational Dynamics, Torque & Angular Momentum

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Physics · L4 · Rotational Dynamics, Torque & Angular Momentum

Collection5 items

01Physics · L4 · Maxwell's Equations

02Physics · L4 · Maxwell's Equations — EM Wave Properties

03Physics · L4 · Maxwell's Equations & Electromagnetic Waves

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Physics

Physics · L4 · Maxwell's Equations

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Physics · L4 · Maxwell's Equations

Flowchart10 objects

Physics

Physics · L3 · Specific Heat & Calorimetry · flowchart

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Physics · L3 · Specific Heat & Calorimetry · flowchart

Note~262 words · 1 min

Density is mass per unit of space Compare everything to water Water is about 1 g/cm³, which makes it a convenient yardstick. Ice floating is why lakes freeze from the top down, and why fish survive winter. Archimedes' principle The upward b

Physics

Physics · L2 · Density & Buoyancy

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Physics · L2 · Density & Buoyancy

Collection5 items

01Physics · L4 · Entropy & Heat Engines

02Physics · L4 · Entropy & Heat Engines — Carnot Efficiency & Refrigerators

03Physics · L4 · Entropy, heat engines, and the Carnot cycle

+2 more

Physics

Physics · L4 · Entropy & Heat Engines

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Physics · L4 · Entropy & Heat Engines

Flowchart10 objects

Physics

Physics · L4 · Choosing Biot–Savart vs Ampere's Law

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Physics · L4 · Choosing Biot–Savart vs Ampere's Law

Quiz4 questions

Which one will spring back to its original shape after you stretch or squish it: a rubber band or a stick of clay?

AA stick of clayBA rubber bandCBoth doDNeither does

Physics

Physics · L1 · Springs & Stretchy Things

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Physics · L1 · Springs & Stretchy Things

Quiz7 questions

Doubling the plate separation of a parallel-plate capacitor, all else fixed, does what to its capacitance?

ADoubles itBHalves itCQuadruples itDLeaves it unchanged

Physics

Physics · L4 · Capacitance & Dielectrics — 7 Q

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Physics · L4 · Capacitance & Dielectrics — 7 Q

Flowchart9 objects

Physics

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

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

Flashcards8 cards

What is electromagnetic induction?1 / 8

The process by which a changing magnetic field through a loop of wire creates (induces) an electric current in that wire.

Physics

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

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

Flowchart11 objects

Physics

Physics · L2 · Measuring Distance With an Echo

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Physics · L2 · Measuring Distance With an Echo

Flashcards7 cards

What happens if you rub a balloon on your hair?1 / 7

The balloon picks up a tiny electric charge, and your hair picks up the opposite charge — so your hair gets pulled toward the balloon and stands up.

Physics

Physics · L1 · Static Electricity: Balloons & Hair

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Physics · L1 · Static Electricity: Balloons & Hair

Collection4 items

01Physics · L2 · Electrical Power & Energy

02Physics · L2 · Electrical Power & Energy

03Physics · L2 · From Watts to a Power Bill

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Physics

Physics · L2 · Electrical Power & Energy

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Physics · L2 · Electrical Power & Energy

Flowchart9 objects

Physics

Physics · L1 · Using a Balance Scale

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Physics · L1 · Using a Balance Scale

Collection4 items

01Physics · L1 · Weighing & Balancing

02Physics · L1 · Weighing & Balancing

03Physics · L1 · Using a Balance Scale

+1 more

Physics

Physics · L1 · Weighing & Balancing

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Physics · L1 · Weighing & Balancing

Collection5 items

01Physics · L5 · Nonlinear Dynamics & Chaos

02Physics · L5 · Chaos: Routes, Measures & Applications

03Physics · L5 · Nonlinear Dynamics and Chaos

+2 more

Physics

Physics · L5 · Nonlinear Dynamics & Chaos

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Physics · L5 · Nonlinear Dynamics & Chaos

Flashcards7 cards

Distinguish a global symmetry from a local (gauge) symmetry.1 / 7

A global symmetry transforms fields by the same fixed amount everywhere in spacetime, e.g. ψ → e^(iα)ψ for constant α. A local (gauge) symmetry allows the transformation parameter to vary from point to point, α(x), and demanding invariance under this much larger symmetry group forces the introduction of a compensating gauge field.

Physics