Thread for photos that 100% do not violate any Terms Of Service, not political, not too lewd, no gas price pics etc.

eat_wrapper.webp
 
The Archimedes method is a little different. You use a hanging balance and first weigh the core then use a tub of water brought under to submerge the core and record the weight which drops according to Archimedes' Principal. Difference in weights = volume of core.
From memory*:

The king wanted to be sure his crown had been made of pure gold rather than an alloy.

The weight of gold was known. (19.32 g/cc, although they would have used different units.)

The problem was that the volume of the intricate crown could not be easily determined.

Archimedes submersed the crown in water, and determined the volume of water displaced. (I would guess by marking the water level before and after, followed by a simple calculation.)

To make the math easy, let's say the crown displaced 100 cc of water.

Therefore, the crown should weigh 19.32 g/cc x 100 cc = 1932 g = 1.932 kg.

But verily, the crown only weighed 1.8 kg! Any metal substituted for gold would have had a lower density, reducing the weight.

Sure, the goldsmith has cheated you.

Off with his head!



* Mostly. I had to look up the density of gold.
 
Back
Top Bottom