Spyke

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44 replies

Erosion is largely done by sediment being transported by the water I believe. The same principle is used in cutting water jets, it isnt the water pressure that cuts things, the water is a medium for abrasive materials

184
Leonixsterreply
lemmy.blahaj.zone

This is also how they cut rocks in ancient egypt I believe? Not with water, mind you, but would use a pretty mediocre if not useless saw but would drop sand in there, so it was actually the sand cutting the rock

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lemmy.world

This is also how they cut rocks in ancient egypt

I'm tired of this human-centric revisionist history. It completely devalues the contributions of hard working aliens.

30

Yep! The would use a saw that often had a blade made of string, like a bow, but would but gritty, sandy water in the hole they were cutting to slowly grind it away. I think they would also use “dull” copper saws (don’t quote me on that one though)

18
jaybonereply
lemmy.zip

Wouldn’t the string break from the abrasive sand long before it made an impact on the stone they were trying to cut?

8

Change the string as it wears out. As long as it makes enough progress to justify the cost of the string it would be a decent choice.

18

I think water by itself can randomly break a few loosely bound atoms off the surface of anything. But the rate of that dissolution is dwarfed by the wear effects of the sediment being transported by the water, which is the primary material remover.

6
Brickedreply
feddit.org

So.. why don't those abrasive materials destroy the hair in the drain?? Explain yourself

1
sopuli.xyz

As my compatriot elucidated, when we were wee morons of damn near adult age, "I could keep stabbing this pole with this piece of metal, and after many eons of stabbing, this pole would come down!"

I may just hallucinated . actually that young man graduated and went on.

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lemmy.blahaj.zone

Eventually, water always wins. But that eventually can take a lot longer than we have patience for

100
just2lookreply
lemmy.zip

Water is also lazy though, and will go wherever is easiest. And that frequently means exactly where you don't want it to go.

72

Unfortunately the floor boards are more permeable than a ball of hair, soap, skin and cum.

3
lemmy.world

Given enough time, same water would carve the tiles around the drain.

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lemmy.world

Envisioning a pretty nasty post-apocalypse sci-fi movie here... Title ideas? 'The Hair That Remains' 'Hair For Eternity' etc

11
lemmy.world

Hair is pretty tough, just see how easily it dulls steel blades

26

This genuinely just improved my outlook on buying new blades

9
sopuli.xyz

I think micro-rusting does the damage here. I oiled a cheap disposable-head razor after every use and the blades were still sharp enough over a year later when the rubber/silicone flex point (hinge?) fell apart.

Sneaky bastards had to specifically add in that part that was vulnerable to oil.

1

I use the classic double edge blades, dirt cheap and rinsing them with hot water is enough to make mine last for quite a while.

I've heard some ppl submerge their razors in Isopropanol to combat rust and soap buildup... Haven't tried that yet.

2
lemmy.world

New rock paper scissors just dropped. Rock Water Hair.

Hair blocks water. Rock breaks hair. Water cuts rock.

9
sh.itjust.works

Thousands to millions of years vs a few weekends, it's about the same right?

6

The thing is, hair is way stronger against erosion than rocks.

You need bacteria, or to cook it in some geothermal activity. Otherwise, even if you gave them the same time, the results would still be similar.

1

Pour 5 gallons into the Grand Canyon, and you'd get about the same effect.

4

because how much force the water is hitting it matters, you can just cut your drainage pipe in half if you use those water blades.

4
lemmy.world

I guess it's because of the water force. Water tend to has stronger force in nature place than in a pipe.

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