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Most platforms show you a video. Ours lets you touch the physics. These are real, interactive content blocks from real topics — click a tab and try them.

Physics · Simple Harmonic Motion

SHM Oscillator

Interactive

Amplitude:50

Press ▶ Start to watch the mass oscillate. Change amplitude while it runs.

New · Interactive concept widgets

See the concepts move

Not videos you watch passively — live widgets you can grab, drag and step through, on every topic across Physics, Chemistry, Maths and Biology. Here are a few, running right now.

Biology · Cardiac CycleLive

Interactive — try it

♥ 72 bpm

Atrial systole — atria contract, push remaining blood into ventricles

AV valves: openSemilunar valves: closed

Heart rate: 72 bpm

Cardiac output = stroke volume × heart rate = 70 mL × 72 bpm = 5.0 L/min

switch tabs — click heart parts, step the cardiac cycle, or compare blood groups

The heart beats and the ECG sweeps live — drag the heart-rate slider and watch cardiac output respond.

Chemistry · Chemical BondingLive

Interactive — try it

	Ionic	Covalent	Metallic
electrons	transferred	shared	delocalised
conducts	molten / solution	no	solid

switch tabs to compare the three bond types — try the electron transfer and molecule buttons

Transfer an electron to form an ionic bond, then compare covalent sharing and the metallic electron sea.

Chemistry · ElectrochemistryLive

Interactive — try it

left right [Mⁿ⁺] cathode = 1.00 M electrolysis mode

E°cell = E°cat − E°an = 0.34 − (-0.76) = 1.10 V · Nernst: Ecell = 1.100 V at [Mⁿ⁺] = 1.00 M

swap the half-cells — the more negative E° always becomes the anode; dilute the cathode ion and watch Ecell drop

Build a galvanic cell — electrons animate through the wire and E°cell updates as you swap electrodes.

Biology · Cell DivisionLive

Interactive — try it

Interphase — DNA replicates; chromatin loose

phase 1 / 6

mitosis: 2 identical diploid cells; meiosis: 4 genetically varied haploid cells

Step through mitosis and meiosis — chromosomes condense, align and separate while ploidy tracks 2n vs n.

Physics · ElectrostaticsLive

Interactive — try it

Drag the test charge through the field of two point charges and feel the force direction flip.

Physics · Dual Nature of MatterLive

Interactive — try it

Raise the light's frequency past the threshold and watch electrons get ejected with KE = hf − φ.

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SHM Oscillator

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