Environmental Econ: Crash Course Economics #22

Adriene: Welcome to Crash Course Economics. I’m Adriene Hill Jacob: And I’m Jacob Clifford. Economics is about choices, and how we use our scarce resources. It’s not just about producing and consuming, it can also be about conserving. Adriene: Maybe counterintuitively, economics has a lot to add to discussions of how we can balance our […]

Electric Current: Crash Course Physics #28

Imagine you’re floating down a river. Maybe the stream is calm and serene, flowing without obstruction. Or perhaps it’s a rushing river, churning and splashing over rocks! Well, the way water moves in a river is a lot like how electricity flows through a wire. But when we say that electricity is flowing, we’re really […]

Electric Charge: Crash Course Physics #25

The shock you get from a doorknob. That trick you used to do with a balloon, to make your hair stick up. Or, of course, a lightning strike. They’re all governed by the same principle: static electricity. Static electricity occurs when an object obtains a net amount of positive or negative electric charge, creating an […]

Electricity: Crash Course History of Science #27

Like thermodynamics, the history of electrical physics has its roots in pre-industrial questions that converged in the nineteenth century. These questions became a research paradigm, driven by a whole crew of researchers… And they led to a power system that reshaped the world. Time to get tingly! [Intro Music Plays] The study of electricity goes […]

The Industrial Revolution: Crash Course European History #24

Hi I’m John Green and this is Crash Course European History. So we’re going to turn our attention now to the Industrial Revolution, one of the most significant developments in human history. Like, imagine with me that it’s 1820. I got this idea from the economist Robert Gordon by the way. You live in, say, […]

Nuclear Physics: Crash Course Physics #45

E=mc^2 You hear it all the time. But what does it mean? During his study of special relativity, Albert Einstein found that mass and energy are equivalent, and that they can be converted back and forth between one another. He described that relationship mathematically, saying that the energy of a particle is equal to its […]

The Engineering Challenges of Renewable Energy: Crash Course Engineering #30

Engineering has given a lot to the world. It’s transformed the nature of work, improved sanitation and helped create vital infrastructure. The bad news is that to power the tools and processes behind those developments, we’ve relied on non-renewable fuels – the kind that get produced at a much slower rate than we use them. […]

ATP & Respiration: Crash Course Biology #7

Oh, hello there. I’m at the gym. I don’t know why you’re here, but I’m going to do some pushups, so you can join me on the floor if you want. Now, I’m not doing this to show off or anything. I’m actually doing this for science. [pained grunt] You see what happened there? My […]

Price Controls, Subsidies, and the Risks of Good Intentions: Crash Course Economics #20

Adriene: Welcome to Crash Course Economics. My name is Adriene Hill Jacob: And I’m Jacob Clifford, and today we’re going to talk about good intentions, and how they can go wrong. Price controls can derail markets. And subsidies can distort them. Adriene: And “deadweight” isn’t just a good description of your ex. [Theme Music] Jacob: […]

Ecosystem Ecology: Links in the Chain – Crash Course Ecology #7

There’s a lot of ideas that we just assume that we know a lot about because we hear about them all the time. For instance, I know what pop music is, but if you were to corner me at a party and say, “Hank, what is pop music?”, I’d be like, “It’s, uh…it’s like, uh…the […]