How Physical Reality Fits Together
Like Duolingo, but for How Physical Reality Fits Together. Tomo turns the whole topic into a game you play five minutes a day, until it actually sticks.
For the part of you with thirty open tabs that never became anything.
A short one: 11 levels across 2 sections, about 22 minutes end to end, roughly 4 days at five minutes a day. It moves through Decoding the Rules You Experience Daily and Pushing Beyond Everyday Intuition. It starts from scratch.
Free forever · No credit card · iPhone & Android

Key ideas in How Physical Reality Fits Together
- Every sensation in daily life originates from just two forces: gravity and electromagnetism
- The strong and weak forces stay trapped deep inside atomic nuclei, entirely beyond our sensory reach
- Atoms never physically collide or merge when touching everyday surfaces
- The negative charges of electrons in your body repel the negative electrons in the chair via electromagnetic repulsion
- Solid touch is an illusion created by microscopic electrostatic repulsion
- Electromagnetism features both positive and negative charges that cancel out over large bodies like planets and stars
- Gravity possesses no negative counterpart, so its pulling power continually adds up across massive cosmic bodies
- Gravity has infinite reach just like electromagnetism, but never cancels itself out
- The strong nuclear force glues protons together in the atomic nucleus, overcoming their urge to repel electromagnetically
- The weak nuclear force governs radioactive decay and subatomic transformations
- Both forces work only across subatomic, nucleus-scale distances
- Each bird follows only a few simple rules relative to its immediate neighbors (like matching speed and avoiding collisions)
- No single lead bird directs the pattern or designs the overall shape of the flock
- Large-scale order emerges automatically when many identical actors follow the same local rules
- Wetness requires many molecules clinging to each other and spreading across a surface
- Temperature and pressure are collective averages of billions of colliding particles, not attributes of a single atom
You've tried the other tabs
Thirty open tabs. Four facts you actually kept.
You watched. You nodded. By Sunday it was gone.
One answer, then back to scrolling.
Eight weeks. You meant to finish. You didn't.
Tomo gives How Physical Reality Fits Together the Duolingo treatment: levels, streaks, and quick quizzes that test what you just learned. That game loop is what the tabs above never had, so it's the one you actually finish.
Here's what playing it feels like
A real question from this course. Take your best guess.
Why don't you ever directly feel the strong and weak nuclear forces?
Get it right to open this lesson and 10 more in the app.
Where How Physical Reality Fits Together takes you
Discover how a handful of fundamental forces and simple rules build everything from solid tables to galaxies. Explore the mechanics of scale, emergence, and the grand quest to unify modern physics.
- 1
Decoding the Rules You Experience Daily
- Spotting the Four Fundamental Forces in Daily Life
- Tracing How Simple Components Generate Emergent Systems
- 2
Pushing Beyond Everyday Intuition
- Using Scaling Laws to Understand Why Size Dictates Form
- Unpacking the Clash Between Quantum Mechanics and Relativity
2 sections · 4 units · 11 levels. Built to play, not to enroll.
You pick the voice
How Physical Reality Fits Together is taught in the The Bestie style: your friend who just gets it. Want a different feel? In the app you can spin up the same topic in any of Tomo's teaching styles. Same facts, totally different vibe.
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Start How Physical Reality Fits Together today.
Download Tomo, search How Physical Reality Fits Together, and play your first lesson in under a minute.