Bozeman Science
Equivalence Principle
In this video Paul Andersen explains how inertial mass and gravitational mass are equivalent. He shows you too simple methods for calculated individual inertial mass and gravitational mass. Albert Einstein used this principle to build...
MinutePhysics
What is Sea Level
An oblate spheroid is a special case of an ellipsoid where two of the semi-principal axes are the same size.
Crash Course
What is a “Developed” Country? Crash Course Geography
Today we’re going to discuss what it means for a place to be “developed”. Development is often associated with economic success — that is countries with higher standards of living and material wealth like those found in Europe and North...
MinuteEarth
The Hurricane Category Scale Is Broken
The current hurricane category scale doesn’t accurately convey the danger of a storm, because it doesn’t account for a hurricane's most destructive factors.
TED Talks
TED: Tracking the whole world's carbon emissions -- with satellites and AI | Gavin McCormick
What we know today about global greenhouse gas emissions is mostly self-reported by countries, and those numbers (sometimes tallied manually on paper!) are often inaccurate and prone to manipulation. If we really want to get serious...
Be Smart
How Science Defines A Year
It's been one (tropical/sidereal/anomalous) year since I uploaded the very first It's Okay To Be Smart. Here's everything that's happened since!
SciShow
Henrietta Leavitt & the Human Computers: Great Minds
Henrietta Swan Leavitt was one of a number of volunteer women astronomers who were allowed to serve as "computers" at Harvard College Observatory, doing tedious work male scientists wouldn't do, and ultimately making a discovery now...
3Blue1Brown
The determinant | Essence of linear algebra, chapter 5
The determinant has a very natural visual intuition, even though it's formula can make it seem more complicated than it really is.
TED Talks
Marilyn Waring: The unpaid work that GDP ignores -- and why it really counts
If you: do laundry, are (or have been) pregnant, tidy up, shop for your household or do similar labor, then by GDP standards, you're unproductive. In this visionary talk, economist Marilyn Waring seeks to correct the failures of this...
TED-Ed
TED-Ed: The infinite life of pi - Reynaldo Lopes
The ratio of a circle's circumference to its diameter is always the same: 3.14159 and on and on (literally!) forever. This irrational number, pi, has an infinite number of digits, so we'll never figure out its exact value no matter how...
Bozeman Science
Radiocarbon Dating
Mr. Andersen explains how carbon-14 dating can be used to date ancient material. The half-life of radioactive carbon into nitrogen is also discussed.
Bozeman Science
Wave Energy
In this video Paul Andersen explains how the energy of a wave if directly related to the amplitude of a wave. The wave energy of a sound wave is the volume of the wave.
Crash Course
Mean, Median, and Mode Measures of Central Tendency - Crash Course Statistics
Today we’re going to talk about measures of central tendency - those are the numbers that tend to hang out in the middle of our data: the mean, the median, and mode. All of these numbers can be called “averages” and they’re the numbers...
Crash Course
Quantum Mechanics - Part 2: Crash Course Physics
e=mc2... it's a big deal, right? But why? And what about this grumpy cat in a box and probability? In this episode of Crash Course Physics, Shini attempts to explain a little more on the topic of Quantum Mechanics.
SciShow
Why Gravitational Waves Are a Big Deal
Last week, it was announced that we've detected gravitational waves on Earth. Now, Hank explains what that means for the future and why it's such a huge deal.
SciShow
Do Personality Tests Mean Anything?
Like most quizzes on the internet, personality tests aren't what you would call "reliable."
MinuteEarth
How Birds Fooled Military Radar
A technology to ignore birds on radar ended up being useful to study and conserve them.
Bozeman Science
Magnetic Permeability
In this video Paul Andersen explains how the magnetic permeability is the ability of a material to form internal magnetic fields. The magnetic permeability of free space is a constant and is much lower than the magnetic permeability of...
Bozeman Science
Electric Field of a Sphere
In this video Paul Andersen explains how the electric field strength decreases as the square of the radius as you move away from a point charge, or a uniform distribution of charge on a sphere. This is a direct application of Coulomb's...
SciShow
There's a Loophole in One of the Most Important Laws of Physics
The laws of thermodynamics are cornerstones of physics - but one of them is more breakable than it appears.
TED Talks
TED: What's next in 3D printing | Avi Reichental
Just like his beloved grandfather, Avi Reichental is a maker of things. The difference is, now he can use 3D printers to make almost anything, out of almost any material. Reichental tours us through the possibilities of 3D printing, for...
Crash Course Kids
Spaced Out
So... how big is the Universe? It's big... really big... no, bigger than that... it's big. In this episode of Crash Course Kids, Sabrina gives us some perspective on this whole Universe thing and how we fit into it.
MinutePhysics
2012 Nobel Prize - How Do We See Light
What was the 2012 Nobel Prize in physics given for? Capturing a single photon of light!
SciShow
How Jupiter’s Moons Showed Us the Speed of Light
Light travels through space as fast as anything in the universe possibly can, but before scientists could figure out light’s speed, they had to figure out whether that speed was even finite.