@Dadifer@lemmy.world to science@lemmy.worldEnglish • 8 days agoA German Experiment Proved That Simple Concrete Spheres Make Fantastic Batteries. Now, California Plans To Submerge A 9-Meter Diameter Sphere In The Ocean And Is Already Planning Versions Of 30 Metersfarmingdale-observer.commessage-square80fedilinkarrow-up1199arrow-down16
arrow-up1193arrow-down1external-linkA German Experiment Proved That Simple Concrete Spheres Make Fantastic Batteries. Now, California Plans To Submerge A 9-Meter Diameter Sphere In The Ocean And Is Already Planning Versions Of 30 Metersfarmingdale-observer.com@Dadifer@lemmy.world to science@lemmy.worldEnglish • 8 days agomessage-square80fedilink
minus-square@A_A@lemmy.worldlinkfedilinkEnglish9•8 days agoPerfect guess ! (afaik) ρ(concrete) ≈ 2.5 tons/m³ so full sphere ≈ (2.5 x 382) tons = 955 tons they have 400 t so the cavity removes : 955 - 400 = 555 t … so 7.51m diam. cavity … so, yes 3/4m thick wall 😌👍 !
minus-square@Cocodapuf@lemmy.worldlinkfedilinkEnglish4•edit-27 days agoThat’s exactly the way I would have calculated it, glad someone beat me to it though. Thanks!
Perfect guess ! (afaik) ρ(concrete) ≈ 2.5 tons/m³
so full sphere ≈ (2.5 x 382) tons = 955 tons
they have 400 t so the cavity removes :
955 - 400 = 555 t … so 7.51m diam. cavity
… so, yes 3/4m thick wall 😌👍 !
That’s exactly the way I would have calculated it, glad someone beat me to it though. Thanks!