Ah, the stately hot air balloon. Not really useful for all that much except for having a grand old time floating around the skies, it's still a marvel of simple physics. Fill a giant balloon with air.

make an object neutrally buoyant in water. understand buoyancy forces. Submarines are important to military operations and to undersea exploration because they can function entirely underwater.

In Pirates of the Caribbean, Jack and Will use an overturned dinghy to hold air underwater. Madness or brilliance?

NORFOLK, Va. — Spongebob, Mickey Mouse and of course Snoopy. They're all staples of the Macy's Thanksgiving Day Parade! This annual tradition mixes art, music, and science for millions of viewers.

A hollow plastic sphere is held below the surface of a fresh water lake by a cable anchored to the bottom of the lake. The sphere has a volume of 0.300 cubic meter, and the tension on the cable is 900 ...

Horizontal convection describes fluid motion driven by differential heating along a horizontal boundary, whereby variations in buoyancy generate circulation. Recent theoretical, computational and ...

Although scuba divers may appear to be "as free as a fish," they're actually loaded down with quite a bit of gear. The Avelo System is designed to help in that regard, as it moves the functionality of ...

Here is another one of those great questions that promotes epic "office discussions". (this one sent in by Russ) "An Olympic-sized swimming pool is filled with 660,000 US gallons of water. An ...

Students prepare a diving tank and a submarine and make the submarine neutrally buoyant in the tank. Submarines are important to military operations and to undersea exploration because they can ...