What really killed Mozart?

Every time you breathe, air travels down the trachea, through a series of channels, and then reaches little clusters of air sacs in the lungs. These tiny sacs facilitate a crucial exchange: allowing oxygen from the air we breathe into...

In this video Paul Andersen explains how heat is the movement of energy from an object with a higher temperature to an object with lower temperature. Heat transfer can occur through conduction, convection, and radiation.

Deep beneath your feet is a molten ball of energy the same temperature as the surface of the sun -- an immense clean energy source that could power the world thousands of times over, says technologist and climate activist Jamie C. Beard....

Paul Andersen explains how energy is conserved within a system. In both macroscopic and microscopic collisions the amount of energy before the collision is equal to the amount after. He then defines heat as energy transfer between...

New ReviewLearn Bernoulli’s Principle with a straw and a ping pong ball. A fun and simple physics demo to see pressure differences in action!

New ReviewA beach ball floating in mid-air, held up by nothing but a leaf blower. It looks like a magic trick — but it's actually Bernoulli's Principle at work. Faster-moving air has lower pressure, so the airstream creates a pressure difference...

Can you blow a ping pong ball out of a funnel? Learn how Bernoulli’s Principle explains why you can't—demonstrated clearly and simply by Mr. P from Flipping Physics.

Learn the physics behind ideal fluid flow and the continuity equation—complete with animation, explanation, and a real-life garden hose example.

Calculate the percentage of an object that stays submerged when it floats. Understand the relationship between the density of an object and the fluid it floats in.<br/>

Watch two soda cans mysteriously move toward one another using nothing but air—and phys

Explore laminar flow and streamlines with this animation of ideal fluid particles moving through a narrowing pipe. See how particle paths and streamlines illustrate fluid motion, perfect for understanding fluid dynamics.

Learn how Bernoulli’s Principle helps create lift using a simple demo with a paper strip and hair dryer. Physics made clear, fun, and free with Mr. P!

Explore the fundamentals of viscosity and how it impacts fluid flow. Learn why water moves easily while ketchup flows slowly through this clear and engaging physics explanation.

Howcast - Learn the two important things you should do after a piercing so it heals correctly from professional piercer Owen Beane in this Howcast video.

Howcast - Learn how to use condoms correctly to protect yourself from sexually transmitted diseases from sexpert Jane Bogart in this Howcast video.

Howcast - Learn how chiropractic care can prevent ear infections from Dr. Karen Erickson in this Howcast video.

Howcast - Learn how to tell you're in labor from childbirth expert Elizabeth Mangum-Sarach in this Howcast video.

Howcast - Learn what to do when your water breaks from childbirth expert Elizabeth Mangum-Sarach in this Howcast video.

Howcast - Learn when to call your doctor or midwife from childbirth expert Elizabeth Mangum-Sarach in this Howcast video. Thumbnail: Revisión by Daquella manera

Howcast - Learn how to treat someone who has food poisoning in this first aid video from Howcast with Nurse Mary.

Howcast - Learn if it's normal for an infant to lose weight from pediatrician Dyan Hes, M.D. in this Howcast video about newborn and baby development.

Howcast - Learn how to drink before, during, and after a run from competitive runners Doug Oldiges and Stephanie Coburn in this Howcast video.

Howcast - Learn about ovarian hyperstimulation syndrome, a complication of infertility treatment, in this Howcast video.