Gwylan
Veteran
- Location
- All at sea⛵
Er? Are you really asking this? Will look for later posts in case someone has dealt with your query
Things that have bothered you for a long time.
- Thread starter Yellow Fang
- Start date
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Er? Are you really asking this? Will look for later posts in case someone has dealt with your query
Chris S
Legendary Member
- Location
- Birmingham
Bike tyres can't aquaplane so why do they have treads?
Andy in Germany
Guru
- Location
- Rottenburg am Neckar
Why is it that the workshop phone is silent until I'm trying to do something like fit a wheel on a bike and don't have any hands free, and then it rings?
Gwylan
Veteran
- Location
- All at sea⛵
That is an area of much, informed debate. I am told. Still hurts when you fall off.
How are slicks on muddy tracks?
Mike Ayling
Veteran
- Location
- Melbourne Downunda
Answerphone message - your call is important to us but all our operators are busy, please leave a message.
Andy in Germany
Guru
- Location
- Rottenburg am Neckar
Usually it's internal, often the till calling because a customer is asking for something bicycle related, or they need help with a queue.
Profpointy
Legendary Member
depends if you just talking about sea ice, or all the ice in glaciers and on Antarctica and such place as well
classic33
Leg End Member
Approximately 230 feet(70 metres).
https://www.usgs.gov/faqs/how-would-sea-level-change-if-all-glaciers-melted
Gwylan
Veteran
- Location
- All at sea⛵
Well, now we know.
Chris S
Legendary Member
- Location
- Birmingham
If it was just sea ice then ocean levels would drop. Ice is less dense than water (the same mass occupies a bigger volume) which is why it floats.
roubaixtuesday
self serving virtue signaller
You sure about that? I'm not.
Thought experiment:
1) Put an ice cube in a glass.
2) Add just enough water so it floats. Mark the water line.
3) Archimedes principle means the cube has exactly displaced its own mass of water.
4) The void left by the melted solid ice will be exactly filled by the mass of ice from melted below the water line plus that previously floating above the water line.
5) Net result: no change
Now, for sea ice this is complicated by the fact that sea ice contains much less salt than ocean water, and also contains air bubbles, plus the effect of net adding fresh water to the surface on circulation of the ocean. I'm not sure what the net result is, but it's not obvious to me which way from zero it is.
[added from a reputable source - it appears there would be a slight rise due to the density difference https://nsidc.org/news-analyses/news-stories/melting-floating-ice-will-raise-sea-level ]
Chris S
Legendary Member
- Location
- Birmingham
It's not the mass of the ice that's important, it's the volume when it melts. It will decrease.
roubaixtuesday
self serving virtue signaller
Yes, but some of that volume is *above* the water, so it exactly cancels out, as per Archimedes. Your statement would be true only if the part of the ice above the water evaporated.
And complication of the density difference to salt water means there is a rise, as per the NSIDC link.
Have a read of that (the NSIDC are the "National Snow & Ice Data Center" - US federal agency)
Title: "Melting of floating ice will raise sea level"
classic33
Leg End Member
You also have to factor in where the extra water would go. Given that this planet is spinning the weight wouldn't be a consistent.
