Jak víme, z čeho jsou hvězdy?

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What you'll learn

A 13-minute video from Ohnisko: “Jak víme, z čeho jsou hvězdy?”.

Science & Math

Video by Ohnisko, played through YouTube's embedded player.

44:07

Nerovnice s absolutní hodnotou OhniskoScience & Math

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Nerovnice s absolutní hodnotou

Ohnisko

A 44-minute video from Ohnisko: “Nerovnice s absolutní hodnotou”.

19:42

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Ohnisko

A 20-minute video from Ohnisko: “Gravitace podle Newtona”.

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3Blue1Brown

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Builds up what a neural network actually is — neurons as numbers, layers, weights and biases — using handwritten-digit recognition as the running example.

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A visual introduction to the Fourier transform: winding a signal around a circle to find its frequencies.

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MIT OpenCourseWare

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Gilbert Strang's first lecture of MIT 18.06: the geometry of linear equations.

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Gödel's incompleteness, Turing's halting problem and the limits of mathematics.

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AT&T Tech Channel

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Bell Labs' J.N. Shive uses a mechanical wave machine to show reflection, standing waves, resonance and impedance matching — the ideas behind transmission lines.

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Entropy, the arrow of time and why the Sun is a source of low entropy rather than just energy.

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MIT 8.04 Quantum Physics I, lecture 1: superposition, introduced through experiments with 'hardness' and 'color'.

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CuriousMarc opens an HP 5061A caesium beam clock and explains, module by module, how it locks to an atomic transition.

Doug McLean | Common Misconceptions in Aerodynamics

Michigan Engineering

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Boeing aerodynamicist Doug McLean dismantles popular wrong explanations of lift and explains what really happens.

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Historia Civilis

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How Julius Caesar's calendar reform produced the 445-day year of 46 BCE and gave us the Julian calendar.