Stories of discovery and invention often begin with a problem that needs solving. Summoned by the king to investigate a suspicious goldsmith, the early Greek mathematician Archimedes stumbles on the principle that would make him famous.

Howcast -If you have scrap gold -- gold with no artistic or antique value -- you can calculate its market value before taking it to a dealer.

Howcast -Learn about the different gold colors -- yellow gold, white gold, rose gold, etc. -- from private jeweler Kate Hemphill in this Howcast video.

Archimedes principle states that if an object is submerged in a fluid, then the buoyant force acting on it is equal to the weight of the fluid displaced by that object. Buoyant force exists because pressure increases as an object goes...

What exactly are alloys? What is it about their properties that make them so useful for a huge variety of purposes, from construction to jewellery? Chemistry - Periodic Table - Learning Points. Alloys are metals mixed with other...

The concept of the mole is a little tricky when you first learn about, but soon you're converting between grams and moles and atoms with ease. Let's practice some conversions using Avogadro's Number now!

This video is an educational overview of alloys, their properties, and different examples. The speaker explains the concept of alloys and why they are used in metals in order to increase strength and hardness. They then focus on steel as...

Archimedes principle states that if an object is submerged in a fluid, then the buoyant force acting on it is equal to the weight of the fluid displaced by that object. Buoyant force exists because pressure increases as an object goes...

In this video, the concept of density is explored through a cocktail experiment. Different liquids with varying densities are layered in a glass container, demonstrating how liquids of different densities do not mix. The video also...

This video provides a brief overview of gold, discussing its properties, uses, and value. They explain how gold is a soft and malleable metal, which is why it is often alloyed with other metals for jewelry. It also highlights the...

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AP Entertai
nment
Paris, France, 25 Ja
nuary 2011
1. Pan from Eiffel Tower to exterior of
Palais de Tokyo
2. Wide of...