TED-Ed
TED-Ed: Valentin Hammoudi: How tall can a tree grow?
Reaching heights of over 100 meters, Californian sequoias tower over Earth's other 60,000 tree species. But even these behemoths seem to have their limits: no sequoia on record has been able to grow taller than 130 meters. So what...
SciShow
Why Doesn't Earth Have Rings?
Plenty of other planets in the Solar System have rings. So why not Earth?
TED-Ed
TED-Ed: Why don't oil and water mix? - John Pollard
Salt dissolves in water; oil does not. But why? You can think of that glass of water as a big, bumpin' dance party where the water molecules are always switching dance partners -- and they'd much rather dance with a salt ion. John...
Bozeman Science
Gravitational Mass
In this video Paul Andersen explains how the gravitational mass is a measure of the force on an object in a gravitational field. The gravitational mass is based on the amount of material in an object and can be measured to a standard kg...
MinuteEarth
Why Earthquakes Are So Hard To Predict
Scientists are trying to figure out if they can predict big earthquakes by simulating small quakes in labs and studying big quakes under the ocean. Thanks to the University of Rhode Island for sponsoring this video....
Bozeman Science
Free-Body Diagrams
In this video Paul Andersen explains how free-body diagrams can be used to solve kinematics problems. The only two parts of a free-body diagram are the object and all external forces acting on the object. Numerous situations are...
Bozeman Science
PS2B - Types of Interactions
Paul Andersen explains how objects interact when touching and at a distance. Electromagnetic forces are very important when objects are touching and fields explain both electromagnetic and gravitational forces. The strong and weak...
Crash Course
What Holds a Country Together or Tears it Apart? Crash Course Geography
Today we’re going to talk about the forces that affect a country’s stability. We’ll take a closer look at Costa Rica, Venezuela, Cuba, and Brazil and examine how the cohesiveness of these Latin American countries varies dramatically even...
SciShow
The First Few Moments That Physics Can't Explain
Although science has provided astounding insights into the origins of the universe, we're still not quite sure what happened in those very first few moments.
TED Talks
Robert Full: Robots inspired by cockroach ingenuity
Insects and animals have evolved some amazing skills -- but, as Robert Full notes, many animals are actually over-engineered. The trick is to copy only what's necessary. He shows how human engineers can learn from animals' tricks.
TED-Ed
TED-Ed: The beginning of the universe, for beginners - Tom Whyntie
How did the universe begin -- and how is it expanding? CERN physicist Tom Whyntie shows how cosmologists and particle physicists explore these questions by replicating the heat, energy, and activity of the first few seconds of our...
Bozeman Science
London Dispersion Forces
In this video Paul Andersen describes the positive force intermolecular forces found between all atoms and molecules. As electrons are distributed unevenly it creates instantaneous dipoles which hold molecules together. This force even...
TED-Ed
TED-Ed: Would you weigh less in an elevator? - Carol Hedden
What happens when you jump in a moving elevator? Do you weigh more when you're going up and less when you're going down? Carol Hedden explores the relationship between gravity, weight, and relative motion, using a moving elevator to...
PBS
Is Gravity An Illusion?
Most of us take gravity as an assumed part of our living realities, but why? Basic physics introduces us to the concept of gravity from a Newtonian sense, but when you start factoring Einstein into an understanding of gravity, things get...
Bozeman Science
Interaction Forces
In this video Paul Andersen explains how forces on an object always require another object. An object cannot exert a force on itself. If net forces on an object are balanced the object will remain at rest or move with a constant...
Crash Course Kids
The Great Escape
Do you know how many people have been to the moon? Only 12! Part of the reason it's so few is because of how difficult it is to escape Earth and get into space in the first place. In this episode of Crash Course Kids, Sabrina talks about...
Bozeman Science
Gravitational Forces
In this video Paul Andersen explains how gravitational forces differ from the other three fundamental forces; electromagnetic, strong, and weak. Gravitational forces are always attractive and operate at all scales. Even though...
Bozeman Science
Vector Sum of Forces
In this video Paul Andersen explains how the vector sum of forces can be used to identify the net force on an object. The net force can be used to determine the overall acceleration of the object using Newton's Second Law.
SciShow
This Tank of Water Could Change Physics Forever
No one has ever conclusively seen a proton turn into other, lighter particles, but fifty million liters of water in Japan might change that and our ideas about subatomic particles forever.
Bozeman Science
Torque
In this video Paul Andersen begins by discriminating between translation and rotational motion. He then explains how a torque is the product of the lever arm and the force perpendicular. The lever arm must be perpendicular to the axis of...
SciShow Kids
How to Make a Paper Airplane
Learn how to make a great paper airplane, and find out what makes it fly!
Crash Course
Liquids: Crash Course Chemistry
In this episode of Crash Course Chemistry, Hank gives you the low down on things like London Dispersion Forces, Hydrogen Bonds, Cohesion, Adhesion, Viscosity, Capillary Action, Surface Tension, and why liquids are just... WEIRD!
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Bozeman Science
Newton's Second Law
In this video Paul Andersen explains how Newton's Second Law applies when a net force acts on a body. The net force vector and the acceleration vector will act in the same direction. If an object acts on another object in a system the...