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Melting ice is slowing Earth's spin, shifting its axis and influencing its core

nbcnews.com

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Re: Melting ice is slowing Earth's spin, shifting its axis and influencing its core

#41

Post by silverquiet »

card_zero wrote: post #40
silverquiet wrote: post #39

Earlier quoted context omitted.

Interesting point about CO2 - I'd assume your thought about condensation is correct, but it also occurs to me to wonder if it's a gas in those little canisters; a lot of the gas systems I've dealt with have a liquid phase somewhere in the loop. And I didn't think that carbonated beverages had any difference in flavor, but a huge difference in texture/mouthfeel.

So what exactly is visible in dry ice mist (see every 80s pop video)? Edit: NM, Wikipedia says "condensing water vapor", indeed.

Yes, it's called dry ice because if you look at a phase diagram, a liquid can't exist at atmospheric pressure, so carbon dioxide ice transitions directly from solid to gas (called sublimating rather than evaporating/melting). One of those neat chemistry things.

Re: Melting ice is slowing Earth's spin, shifting its axis and influencing its core

#42

Post by apothegm »

silverquiet wrote: post #9
josefritzishere wrote: post #5

Is that as scary as it sounds?

We can measure tiny increments of time to see really small effects on the Earth; it's a testament to how good a lot of our instruments are really. What's scary to me is that the carbon content of the very air we breathe has increased by a third since the time when my mother was a child. That's hardly a small thing.

Hm… humans (all mammals, really) react with great distress to high CO2 concentrations in the air. Now, the concentrations at which that reaction can be measured are MUCH higher than the current ones. But it does make me wonder whether we are reacting to them subconsciously anyway. That might help explain the increased incidence of anxiety and depression, among many other things.

Re: Melting ice is slowing Earth's spin, shifting its axis and influencing its core

#43

Post by stainablesteel »

practicemaths wrote: post #10
stainablesteel wrote: post #4

[flagged]

Hmmm I did not realize conservation of momentum was absolute hogwash. News to me.

in space? in a vacuum? being affected by literally 0.0001% of all mass of the rotating body?

Re: Melting ice is slowing Earth's spin, shifting its axis and influencing its core

#44

Post by practicemaths »

stainablesteel wrote: post #43
practicemaths wrote: post #10

Earlier quoted context omitted.

Hmmm I did not realize conservation of momentum was absolute hogwash. News to me.

in space? in a vacuum? being affected by literally 0.0001% of all mass of the rotating body?

Short video lesson for you:

https://youtu.be/M6PuutIm5h4?si=RmUV7D74DYfPoY2l

Re: Melting ice is slowing Earth's spin, shifting its axis and influencing its core

#45

Post by vel0city »

mattmanser wrote: post #18
noselasd wrote: post #6

Earlier quoted context omitted.

Yes. Have a look at e.g. https://www.climate.gov/news-features/understanding-climate/...

I firmly believe in climate change and global warming. I do have a question though. The graph presented starts in 1880 and rises linearly from then, with no correlation to a graph of CO2 levels, which had far more exponential growth between 1880 - 2010s, until recently. As I understand it, the mini-ice age finished in the 1800s. And started in the 14th century. So, is this actual evidence? There doesn't seem to be an…

Zoom in and pan around. You'll notice it is not linear.

Look at the slope of 1900 to 1950. Then look at the slope of 1970 to 2020. Are you telling me that's the same slope?

Re: Melting ice is slowing Earth's spin, shifting its axis and influencing its core

#46

Post by vel0city »

silverquiet wrote: post #39
card_zero wrote: post #38

Earlier quoted context omitted.

I did play with CO2 a lot when I was a kid, though. I used to buy the little canisters that serve some purpose or other for home brewing, and hammer nails through the ends so they went off like rockets and skittered all over the yard. There was a lot of visible gas, but maybe the expansion of the CO2 made it cold and so I was seeing condensing water? Also I played with the soda stream a lot, I think CO2 has a distinc…

Interesting point about CO2 - I'd assume your thought about condensation is correct, but it also occurs to me to wonder if it's a gas in those little canisters; a lot of the gas systems I've dealt with have a liquid phase somewhere in the loop. And I didn't think that carbonated beverages had any difference in flavor, but a huge difference in texture/mouthfeel.

Carbonated beverages have carbonic acid in them (H2CO3). Even after all the bubbles are gone a carbonated drink will be more tart than a non-carbonated version of the same drink.

Re: Melting ice is slowing Earth's spin, shifting its axis and influencing its core

#47

Post by stainablesteel »

practicemaths wrote: post #44
stainablesteel wrote: post #43

Earlier quoted context omitted.

in space? in a vacuum? being affected by literally 0.0001% of all mass of the rotating body?

Short video lesson for you: https://youtu.be/M6PuutIm5h4?si=RmUV7D74DYfPoY2l

that's not a sphere, those hammers are changing distance to his core by more than 50% of the total distance, ice caps on earth do not reach the same % difference in height

completely irrelevant video

Re: Melting ice is slowing Earth's spin, shifting its axis and influencing its core

#48

Post by practicemaths »

stainablesteel wrote: post #47
practicemaths wrote: post #44

Earlier quoted context omitted.

Short video lesson for you: https://youtu.be/M6PuutIm5h4?si=RmUV7D74DYfPoY2l

that's not a sphere, those hammers are changing distance to his core by more than 50% of the total distance, ice caps on earth do not reach the same % difference in height completely irrelevant video

You really need to go back to school.
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