5 ms·
Given most buildings are upwards of 90% air by volume, that's still quite dense.
by wolfram74 6y ago
Given most buildings are upwards of 90% air by volume, that's still quite dense.
- heavenlyblue 6y agoWanted to argue with you but apparently concrete is only 2.5g/cm3 so not that much different from water.
- deleted 6y ago[deleted]
- stjohnswarts 6y agoThere have been ships made of concrete which I always found interesting. Ferrocement (I believe) is a form of boatcraft that can be done in your backyard without any special tools.