Live data from Hacker News

Earth now weighs six ronnagrams: New metric prefixes voted in

phys.org

101–110 of 215 posts

Re: Earth now weighs six ronnagrams: New metric prefixes voted in

#101

Earlier quoted context omitted.

I believe we have Ronald Reagan to thank for cancelling our efforts from the 70s.

[flagged]

Raegan was a complete walking disgrace. But the media was very kind to him, if you don't investigate carefully what he was doing you'll believe that he was a great president. The only explanation I see is that he was fantastic for the war industry and gave everything the very rich were expecting in terms of fiscal policy.

Re: Earth now weighs six ronnagrams: New metric prefixes voted in

#102

Earlier quoted context omitted.

weird question for anyone with the relevant knowledge, would 25 ronna-Reagans in one place behave differently than our sun? I know that mass would be mostly oxygen, but at that scale does it matter?

You should ask Randall Munroe! :) http://what-if.xkcd.com

He did something pretty close early on: https://what-if.xkcd.com/4/

Upping the mass to the sun size would cause some interesting additional wrinkles because now we're talking about being large enough to have "problems" with the pressures in the middle being sufficient to start causing atoms to squish together, but it would take an astronomer to be clear on what happens next. My gut and layman's understanding says you might get a pretty big boom in a couple hundred thousand years or so, because you'd basically be building a sun that would be fairly far along its fuel consumption cycle.

Re: Earth now weighs six ronnagrams: New metric prefixes voted in

#103
post #59

Earlier quoted context omitted.

One ronna-reagan is approximately 4% of the sun's mass: https://www.google.com/search?q=%28185+pounds%29+*+10%5E27+%... At least if I have that right. A single Reagan's mass is from: https://www.celebheights.com/s/Ronald-Reagan-1750.html Or, if you prefer, our sun as about 25 ronna-Reagans.

weird question for anyone with the relevant knowledge, would 25 ronna-Reagans in one place behave differently than our sun? I know that mass would be mostly oxygen, but at that scale does it matter?

Are you asking in terms of gravitation or as a star?

By mass, the sun is 71% Hydrogen and 27.1% Helium, the last 1.9% or so being heavier elements (much of that being oxygen.

I’m no expert, but I suspect a mass of 25 ronna-Reagans would not make a very good star. I imagine it might collapse into a dense Oxygen and Carbon rich sphere, and in that environment various chemical reactions might turn it into some other kind of material.

But maybe I’m way off.

Re: Earth now weighs six ronnagrams: New metric prefixes voted in

#104
post #99

Pretty nice table here: https://en.wikipedia.org/wiki/Metric_prefix "(...) he had the idea for the update when he saw media reports using unsanctioned prefixes for data storage such as brontobytes and hellabytes. (...)" and "The only letters that were not used for other units or other symbols were R and Q" So it seems the new prefixes are partly initiated by the exponential computer storage needs rather than scientif…

Do we need to have a single letter? Is it acceptable to combine prefixes?

Eg: 1 QB (quettabyte) == 1,000,000 YB (yottabytes) == 1 MYB (mega-yottabyte)

Without the new prefixes, we could have gone to 1 YYB (1,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000, or 10^48 bytes)

Re: Earth now weighs six ronnagrams: New metric prefixes voted in

#108

From https://en.wikipedia.org/wiki/Metric_system : “The SI has been adopted as the official system of weights and measures by all nations in the world except for Myanmar, Liberia, and the United States.”

And the UK, unless for some reason their official speed limits and such aren't actually, you know, official.

As a practical matter, we use metric for many things in the US. The fact that we do not force everyone to change their customary units to metric really seems to irk some folks, but mostly outside the US.

Re: Earth now weighs six ronnagrams: New metric prefixes voted in

#109

Via https://www.nature.com/articles/d41586-022-03747-9 , "Extreme numbers get new names": The prefixes ronna and quetta represent 10^27 and 10^30, and ronto and quecto signify 10^−27 and 10^−30. Earth weighs around one ronnagram, and an electron’s mass is about one quectogram. This is the first update to the prefix system since 1991, when the organization added zetta (10^21), zepto (10^−21), yotta (10^24) and yocto (…

Just now learning why it's called Yocto Linux.

Re: Earth now weighs six ronnagrams: New metric prefixes voted in

#110
post #4

Earlier quoted context omitted.

> However metric prefixes need to be shortened to just their first letter—and B and H were already taken, ruling out bronto and hella.

how is B taken?

Byte, as per ISO/IEC 80000 (which includes SI in the Part 1).
Post reply on HN