How can Sigma make sure the FFF is the best success it can be? Locked

Scottelly wrote:

D Cox wrote:

DMillier wrote:

As you are unyielding on the nomemclature, I can at least take issue with this

Metre is an SI unit and spelt the french way, "meter" is something you find in poetry. You are also out of date in your definition. The metre is now defined as a fraction of the speed of light.

A multiple of the wavelength of a particular spectral line, I think.

The Kilogram has a new definition since 2019. One that is a little to complicated for me!

Anyway, this kind of thing leads to unending debate, so I think it is time to retire from the fray.

This is the kind of topic that Wikipedia does well.

https://en.wikipedia.org/wiki/Kilogram#Redefinition_based_on_fundamental_constants

Don

I learned in school that a kilogram is 1,000 grams

Correct of course

, and that a gram is the weight of one cubic centimeter of water.

One cc of water (1 ml of water) has a mass of 1g, not weight. Weight is a force, measured in Newtons. Weight is very much dependent on the local gravity, mass is not.

I don't know how a definition of something can be changed. That seems absurd to me.

Measurement units are generally arbitrary (what's a grain or a furkin?). SI units are the accepted units used internationally in science. They have been carefully defined to a standard. The standard used has been revised from time to time to be as accurate as possible and to be based on something less arbitrary or more fundamental, usually something to do with fundamental constants.

Then again, I think it seems absurd to change the name of a city or sports team, but that kind of thing seems to be going on all the time these days. Change is constant. Then again, some things never change, right?

I met some friends of my 16 year old daughter today - they seem quite happy changing their names and their genders more often than their socks. Apparently it is bad form to ask what their real names are. So, yes, everything changes and new stuff seems odd to oldies.

Next we'll find that global warming advocates have decided to change the definition of zero degrees.

Are there people actually advocating for global warming? Oh yes, I remember, they'll be people with lots of shares in fossil fuel industries who hope they'll be dead before civilisation collapses. Those people.

The only reliable measure of zero degrees is 0 Kelvin and the uncertainty principle makes even that unreliable.