Hi Panos,

I have watched many cooking program on the TV but never attempted to try it meself. I can’t recall any good chef, even bad ones, posing this question. They just said take a large onion or two cloves of garlic. You found a ground to send such celebrity chefs back to school.

 I called around and asked more enthusiastic cooks (known as chef these days), alas nobody knew. Only one, whose daytime job is running a pharmacy, came up something of value. He said he is using the site below- apparently he measures everything and doesn’t say “this will do”. I hope you put it to good use.  

http://go.key.net/rs/key/images/Bulk%20Density%20Averages%20100630.pdf

Those who specialize in soil mechanics, know that not two soil samples have the same bulk density.  Thus, you should be content with the average bulk density.

Unlike density, specific weight is not absolute. It depends upon the value of the gravitational acceleration