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Posts tagged density

November 9, 2012


ice cubes close up

How Does Ice Cool Drinks?

Drop a few ice cubes into a glass of water at room temperature, and in a few minutes the water will cool. How does this work?

September 26, 2012


lava lamp in shadow

The Physics Of A Lava Lamp

There are two ingredients inside a lava lamp: a watery liquid, and a waxy compound that collects at the bottom when the lamp is turned off.

May 21, 2012


needle floating in a plate of water

The Floating Needle

Here's a neat experiment you can try at home!

November 21, 2011



Heavy Air

Here's an odd-seeming question. Does air weigh anything?

June 7, 2011


Bottles with experiment

How Does The Cartesian Diver Experiment Work?

The Cartesian diver, named after French philosopher and scientist René Descartes, works because of several factors.

April 5, 2011


lava lamps in the dark

Make Your Own Lava Lamp!

This easy-to-do experiment is a great way to learn about density.

April 1, 2011


floating wood

The Archimedes’ Principal And Rock Density

Why does a small rock sink to the bottom of a glass when a piece of wood floated on top?

September 16, 2008



How Do You Make A Diet-Coke Float?

Here is an at home experiment you can try! Learn about molecular density!

March 31, 2005



Greek philosopher Archimedes realized that anything that displaces its own weight in water will float. Learn more on this Moment of Science.

August 19, 2004



Why is it that you can't put down hydrogen gas? Find out on this Moment of Science.

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