Thanks to the Heising Simons Foundation ( for their support of this video, and of short range gravity research.



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As we learn more about electricity, we have to talk about fields. Electric fields may seem complicated, but they're really fascinating and a crucial part of physics. In this episode of Crash Course Physics, Shini chats about capacitors,...

What if you were on a high floor of a skyscraper and the building started swaying? Today we’ll explore statics and dynamics, and what they mean for the structures we design. We look at the idea of static equilibrium, forces, and torques,...

Part one of a four part series on the fundamental forces (or interactions) of physics begins with the strong force or strong interaction - which on the small scale holds quarks together to form protons, neutrons and other hadron particles.

It seems like a good idea to stretch before exercising, but does it actually prevent injuries, or improve your performance?

Mr. Andersen contrasts nuclear reactions to chemical reactions. He explains the four main forces of nature; including gravity, electromagnetism, strong, and weak nuclear forces. He also explains how fusion differs from fission.

In this video Paul Andersen explains how the strong nuclear force holds the nucleus together in spite of repulsive electrostatic charges acting on the nucleons. Mesons exchanged between nucleons keep the nucleus intact and gluons...

In this video Paul Andersen explains how a vector field shows the distribution of vector quantities. In AP Physics 1 student should be able to map and understand gravitational vector fields. In AP Physics 2 students should be able to...

In this video Paul Andersen explains the important properties of solutions. A solution can be either a solid, liquid or gas but it must be homogeneous in nature. The solutes can not be separated with a filter and so either...

Did you know that centrifugal force isn't really a thing? I mean, it's a thing, it's just not real. In fact, physicists call it a "Fictitious Force." Mind blown yet? To explore this idea further, this week Shini sits down with us to...

The weak force has been causing trouble for a century, ruining everything physicists thought was true. But it might actually be responsible for your very existence.

Writing a great English paper can be tough because literature doesn't always reveal its deeper meanings immediately. You might not know Mr. Darcy's true feelings for Elizabeth Bennett in Jane Austen's Pride and Prejudice or grasp the...

Researchers have made some unexpected readings of mysterious particles called muons, which may make us reexamine the Standard Model in physics.

Jessi and Squeaks are at the fair, and Jessi is excited to go on the roller coaster! But before they get on, Squeaks wants to know how roller coasters work.

In this video Paul Andersen describes the structure and explains the properties of molecular solids. High intramolecular forces hold electrons and reduce conductivity, whereas low intermolecular forces decrease the melting point. ...

Want to learn how to make a super secret hide-out? Jessi shows you how a bedsheet, some books -- and a little bit of science -- can be used to make an awesome fort!

Did you know that when you’re soaring on the swings, or sliding down the slide, you’re taking part in some seriously cool science? Jessi explains the forces you can find at the playground!

Paul Andersen explains how physical systems remain stable and unstable over time. The sum total of interactions acting on the system determine its stability. Feedback loops are used to maintain stability but require energy. If the...

Forces are pushes or pulls on an object. Forces can be determined by measuring the motion of an object. If an object accelerates then a force is present.

In this video Paul Andersen explains how intermolecular forces differ from intramolecular forces. He then explains how differences in these forces account for different properties in solid, liquids and gases. Some of these properties...

Paul Andersen introduces forces, motion, and Newton's three laws in this video. He begins by describing forces as pushes or pulls on objects that produce motion. A lack of motion results from a balanced set of forces. A teaching...

Zombies are EVERYWHERE!! Wait, don't panic- we mean in pop culture, not outside your window. But why is that? Bad guys and monsters seem to go through phases: one decade there's a dozen movies about aliens, ten years later it's vampires....

Parents, take a deep breath: how your kids turn out isn't fully on you. Of course, parenting plays an important role in shaping who children become, but psychologist Yuko Munakata offers an alternative, research-backed reality that...

In this video Paul Andersen explains how contact forces result from interatomic forces. The following forces are explained at the interatomic level: normal force, applied force, friction force, tension force, spring force, and buoyant...