In this video[0] of an open-pit mine, Sempertrans claims their conveyors move 6 meters per second,and elsewhere[1] they claim to move 18,000 tons an hour, ie 5 tons per second—just under 1 ton per meter of belt? It must be pretty dense, something like ~800kg/m^2? That checks out for cubes of lignite.
So only 198,000 such conveyors are needed in world.
Let's see what that means. There are ~2000 lbs/ton, so 500 tons/second. Search returns "On average, a ton of coal produces 21 to 22 gigajoules of energy." That'd imply about 1 TW worth of coal.
From a bit of cursory googling the birth numbers seem right but the marriage numbers are low. I wonder if they're only counting marriages in countries where marriage data is available.
This is amazing. Either some of it is wrong or my sense of scale needs a vast adjustment!
Like, I’m a little surprised that smoking is more popular than YouTube, but that’s probably correct. But the numbers on meat relative to corn seem a little high.
There are 28.5 million uber trips per day (~10 billion trips / year) but Uber's gross bookings are ~$37 billion. Which means the average booking is $3.70 ? That feels... weird? I paid $71 to get to the airport yesterday. Where are the $1.00 trips that offset stuff like that?
Fair enough, but to average $3.70 there would need to be literally 100 $3 rides to "offset" my trip to the airport. I guess it must be true, I'm not here claiming Uber is lying in their quarterly reports. I'd be really curious to see more detail on price per ride, and volume of total rides broken out by country (or even in more detail tbh).
Building awe and respect and rational instincts through data!
The next wow for me was to consider some ratios, e.g.,
- whatsapp messages to emails: I'm shocked whatsapp is even comparable
- cars to smartphones:
- youtube's scale is scary: it's like the lingua franca. What's the comparable
Update to display those?
I'd also like the ratios to themselves be scaled by the lifetime of the underlying data. E.g., births and marriages, smartphones and cars both have different lifetimes. Similarly for red blood cells vs neurons.
If you had a user entry where people could enter proposed ratios or lifetime-adjusting calculations, and then let others rank those by popularity, you'd segregate the user population into viewers, contributors, and creators, and then perhaps measure techniques for expanding the funnel. Instead of global db/rank, you might propagate contributions to other contributors, with rank by count of links, for decentralized pagerank.
Very interesting, but anyone know why the number of births is so much higher than the number of newly married couples? I would assume that mostly everyone get married and that therefore the number of married couples should be roughly 1/2 of the number of babies born, right? But it seems a lot lower than that.
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[ 4.3 ms ] story [ 52.1 ms ] threadIn this video[0] of an open-pit mine, Sempertrans claims their conveyors move 6 meters per second,and elsewhere[1] they claim to move 18,000 tons an hour, ie 5 tons per second—just under 1 ton per meter of belt? It must be pretty dense, something like ~800kg/m^2? That checks out for cubes of lignite.
So only 198,000 such conveyors are needed in world.
0. https://youtu.be/b0JqGy-rs2I
1. https://easyengineering.eu/interview-with-sempertrans/
If this belt can do 5 tons per second, that's 10,000 lbs per second per belt
So to reach 1,000,000 lbs/s globally, you would do:
1,000,000 lbs/s divided by 10,000 lbs/s/belt = 100 belts
No?
https://www.carbonbrief.org/mapped-worlds-coal-power-plants/ says it's 2 TW currently generated, which is (barely) within a factor of two of this.
There are ~3e7 seconds in a year, so 1.5e10 tons/year. If a ton is a bit under a cubic meter, this'd be very roughly a cube of >2km on a side.
And the number is 5-6x not 10x.
In various different cultures and subcultures the ratios may be different
Like, I’m a little surprised that smoking is more popular than YouTube, but that’s probably correct. But the numbers on meat relative to corn seem a little high.
edit: I had made a mistake, see my other comment
¯\_(ツ)_/¯
edit: I had made a mistake, see my other comment
Sorry!
Building awe and respect and rational instincts through data!
The next wow for me was to consider some ratios, e.g.,
- whatsapp messages to emails: I'm shocked whatsapp is even comparable
- cars to smartphones:
- youtube's scale is scary: it's like the lingua franca. What's the comparable
Update to display those?
I'd also like the ratios to themselves be scaled by the lifetime of the underlying data. E.g., births and marriages, smartphones and cars both have different lifetimes. Similarly for red blood cells vs neurons.
If you had a user entry where people could enter proposed ratios or lifetime-adjusting calculations, and then let others rank those by popularity, you'd segregate the user population into viewers, contributors, and creators, and then perhaps measure techniques for expanding the funnel. Instead of global db/rank, you might propagate contributions to other contributors, with rank by count of links, for decentralized pagerank.
The speed seems to be relative to the CMB, by the way.
[1] https://bionumbers.hms.harvard.edu/Search.aspx?task=searchby...