hissinroaches
Jr. Member
i was wondering why coins bury themselves over time,when rocks are usually pushed to the surface from the frost and the freezing durring the winter?
Huh?MD Dog said:I've tried to explain this phenomenon before but some people are stuck on weird science. It all has to do with density. each type of coin has a specific density as does the soil it falls on. Once it penetrates the grass roots area this plays more prominently into the system. The coin will reach a place within the soil matrix where it's same specific density is reached. this same system can be demonstrated with liquids using liquids of varying densities differing densities will create separate layers. If you pour a liquid into this layered environment all will be mixed for a short period but it will al settle out again into separate layers with the added liquid seeking out a similar density level as its self. If none are found it will form a new level. So it is a coin dropped onto the soil will sink until the surrounding soil equall its specific density. As to why stones are forced to the top from a frost freeze action. It is the same. Although most stones are harder than surrounding soil the relative density can be less.
jlb783 said:Huh?MD Dog said:I've tried to explain this phenomenon before but some people are stuck on weird science. It all has to do with density. each type of coin has a specific density as does the soil it falls on. Once it penetrates the grass roots area this plays more prominently into the system. The coin will reach a place within the soil matrix where it's same specific density is reached. this same system can be demonstrated with liquids using liquids of varying densities differing densities will create separate layers. If you pour a liquid into this layered environment all will be mixed for a short period but it will al settle out again into separate layers with the added liquid seeking out a similar density level as its self. If none are found it will form a new level. So it is a coin dropped onto the soil will sink until the surrounding soil equall its specific density. As to why stones are forced to the top from a frost freeze action. It is the same. Although most stones are harder than surrounding soil the relative density can be less.
lastleg said:MD: Have you experimented with clad vs silver in the heavy
syrup/honey test. I think that would be interesting for all to
hear about.
lastleg said:Uh-oh, MD, we forgot to take the specific gravity of gasses
into the formula. This may take all day.
Huh, hell pay attention.jlb783 said:Huh?MD Dog said:I've tried to explain this phenomenon before but some people are stuck on weird science. It all has to do with density. each type of coin has a specific density as does the soil it falls on. Once it penetrates the grass roots area this plays more prominently into the system. The coin will reach a place within the soil matrix where it's same specific density is reached. this same system can be demonstrated with liquids using liquids of varying densities differing densities will create separate layers. If you pour a liquid into this layered environment all will be mixed for a short period but it will al settle out again into separate layers with the added liquid seeking out a similar density level as its self. If none are found it will form a new level. So it is a coin dropped onto the soil will sink until the surrounding soil equall its specific density. As to why stones are forced to the top from a frost freeze action. It is the same. Although most stones are harder than surrounding soil the relative density can be less.
RGINN said:So MD Dog you are saying that 'soil density' would explain why I found items 125 years old at one site only a 1/2 inch deep, but in another different area 20 year old items were only 4 inches deep? That's pretty cool, and there should be some use I could put that knowledge to.