TED-Ed
TED-Ed: How do airplanes stay in the air? | Raymond Adkins
By 1917, Albert Einstein had explained the relationship between space and time. But, that year, he designed a flawed airplane wing. His attempt was based on an incomplete theory of how flight works. Indeed, insufficient and inaccurate...
Curated Video
How Do Animals Fly?
Biological evolution has allowed some animals to fly. Find out exactly how their wings work to achieve this. Physics - Forces - Learning Points. Flight occurs when the upward force is greater than the downward. Flight is explained by...
Curated Video
How Do Planes Fly?
Aeroplanes use the same forces and physical principles as birds to fly. Discover how man has copied nature to achieve flight. Physics - Forces - Learning Points. Flight occurs when the upward force (lift) is greater than the downward....
National Institute of Standards and Technology
Operating Principles of the NIST 4 Watt Balance Source
The watt balance lets researchers determine the mass of an object indirectly by determining two quantities: the strength of the magnetic field, and the current running through a coil of wire.
Curated Video
Pressure Differences in Fluids and Upthrust
The video is a lecture presentation on pressure differences in fluids. The presenter explains the concept that the weight of a fluid gives rise to a pressure at all points in the fluid and demonstrates how to calculate differences in...
Curated Video
How does an Electric Motor work? DC Motor explained
DC Motor explained - in this video we look at how does a dc motor work to understand the basic working principle of a DC motor. We consider conventional current, electron flow, the winding, armature, rotor, shaft, stator, brushes, brush...
Visual Learning Systems
Forces in Fluids: Buoyancy and Density
Upon viewing the Forces in Fluids video series, students will be able to do the following: Define fluids as substances that can easily flow and readily change shape. Explain that fluids flow because particles can easily move past each...