PBS
Are You a Boltzmann Brain?
Was an incredible drop in entropy responsible for the Big Bang? If that's the case, this would lead us to conclude that a great many other things are possible, including the likelihood that you are a Boltzmann Brain.
Bozeman Science
Reversible Reactions
In this video Paul Andersen describes how reversible reactions achieve equilibrium as reactants are converted to products and products are converted to reactants. A model shows how forward reaction rates and reverse reactions rates...
Crash Course
Kinetics: Chemistry's Demolition Derby - Crash Course Chemistry
Have you ever been to a Demolition Derby? Then you have an idea of how molecular collisions happen. In this episode, Hank talks about collisions between molecules and atoms, activation energy, writing rate laws, equilibrium expressions,...
Crash Course
Equilibrium: Crash Course Chemistry
In this episode of Crash Course Chemistry, Hank goes over the ideas of keeping your life balance... well, your chemical life. Equilibrium is all about balance and today Hank discusses Chemical Equilibrium, Concentration, Temperature, and...
MinutePhysics
Why Do Compressed Air Cans Get Cold?
This video is about compressed air cans (aka gas dusters) and why they get cold when you spray them. They cool off because the refrigerant inside (1,1-difluoroethane) is under pressure and boils off when the pressure lowers, and energy...
Bozeman Science
Using Gibbs Free Energy
In this video Paul Andersen explains how you can use the Gibbs Free Energy equation to determine if a process is spontaneous or not spontaneous. If the _G is less than zero the process is spontaneous. If the _G is greater than zero the...
Crash Course
Equilibrium Equations: Crash Course Chemistry
In which Hank shows you that, while it may seem like the Universe is messing with us, equilibrium isn't a cosmic trick. Here, he shows you how to calculate equilibrium constant & conditions of reactions and use RICE tables all with some...
Bozeman Science
Wave Superposition
In this video Paul Andersen explains how waves interact when moving through one another. Unlike particles waves can interfere both constructively and destructively. The amount of interference is determined through the superposition...
Crash Course
The First & Zeroth Laws of Thermodynamics: Crash Course Engineering #9
In today’s episode we’ll explore thermodynamics and some of the ways it shows up in our daily lives. We’ll learn the zeroth law of thermodynamics, what it means to reach a thermal equilibrium, and define the first law of thermodynamics....
Bozeman Science
Equilibrium
In this video Paul Andersen explains how equilibrium is achieved in a reversible reaction. When the rate of the forward reaction is equal to the rate of the reverse reaction the system is at equilibrium. Graphical analysis of equilibrium...
Bozeman Science
The Equilibrium Constant
In this video Paul Andersen defines the equilibrium constant (K) and explains how it can be calculated in various reversible reactions. The equilibrium constant is a ratio of the concentration of the products to the concentration of the...
TED-Ed
TED-ED: The chemical reaction that feeds the world - Daniel D. Dulek
How do we grow crops quickly enough to feed the Earth's billions? It's called the Haber process, which turns the nitrogen in the air into ammonia, easily converted in soil to the nitrate plants need to survive. Though it has increased...
Crash Course
Price Controls, Subsidies, and the Risks of Good Intentions: Crash Course Economics
So, during times of inflation or deflation, why doesn't the government just set prices? It sounds reasonable, but price ceilings or floors just don't work. Adriene and Jacob explain why. Subsidies, however, are a little different, and...
Bozeman Science
The Reaction Quotient
In this video Paul Andersen explains how the reaction quotient is used to determine the progress of a reversible reaction. The reaction quotient (Q) is the ratio of the concentration of products to the concentration of reactants. The...
Bozeman Science
Acid-Base Equilibrium
In this video Paul Andersen explains how acid-base chemistry can be understood in terms of equilibrium. Water is present in all acid-base chemistry and is amphoteric in nature. The Ka and Kb values can be used to determine the strength...
Crash Course
pH and pOH: Crash Course Chemistry
In this episode, Hank goes over Reversible Reactions, the water dissociation constant, what pH and pOH actually mean, Acids, Bases, and Neutral Substances as well as the not-so-terrifying Logarithms, strong acids, weak acids, and how to...
Bozeman Science
Simple Harmonic Motion
In this video Paul Andersen explains how simple harmonic motion occurs when a restoring force returns an object toward equilibrium. The two types of harmonic motion studied in AP Physics are the mass spring oscillator and the simple...
Professor Dave Explains
Community Ecology and Landscape Ecology
With a better understanding of population ecology, we are ready to zoom out and look at community ecology, which involves interactions between species, as well as landscape ecology, which will broaden our understanding of ecosystems. How...
Curated Video
Equilibrium
A reversible chemical reaction reaches equilibrium when the concentrations of the reactants and products are constant. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
Curated Video
Chaos By Mistake
How a small error in accuracy in the 19th century led to the prediction the Universe would one day fall apart – and the development of chaos theory. How small changes in dynamic systems can lead to much greater, unpredictable events....
Curated Video
The Prisoner's Dilemma
Should two suspects, held in separate cells, accuse the other of the crime to secure their own freedom? And why a similar situation led to a vital equilibrium in the Cold War nuclear arms race. Maths - Statistics And Probability A Twig...
Curated Video
Osmosis
The movement of water from a less concentrated solution to a more concentrated one, through a partially permeable membrane. A Twig Science Glossary Film. Key scientific terms defined in just 60 seconds using stunning images and concise...
Flipping Physics
Motional emf via Newton's Second Law
Ever wondered how the motion of a conductor in a magnetic field generates voltage? We break it down with a real-world example of an airplane wing cruising through Earth's magnetic field. Don't worry; we keep it light and fun! Learn about...
Curated Video
Navigating Weightlessness: Life in Space
Explore the impact of weightlessness on the human body through the eyes of astronauts and specialists. Discover how the absence of gravity affects muscle and bone health, blood circulation, and even the sense of balance. Learn about the...