Recent content by Innoko

No ideas? (making the thread to go up)

Sorry, I have no time to check it fully, but 10^33 if way to much for a speed. It's 10^25 times higher than the speed of light!

U may delete this thread, if you find it homework-like. Anyway, I've created one in homework section as it was told to. Thank you for attention!

It is told, that all homework-like threads should be posted there. So, here I go. Imagine such a situation: there is a vertical rod and a cylinder, with the hole diameter sightly larger than the diameter of rod. There is also a second rod, attached to the cylinder perpendicularly. There is a...

Imagine such a situation: there is a vertical rod and a cylinder, with the hole diameter sightly larger than the diameter of rod. There is also a second rod, attached to the cylinder perpendicularly. There is a friction between the main rod and the cylinder. It is known, that if we put a...

I'll tell u, if my experiments will go on well.

Thank u. "Therefore, in order to prepare a welldefined initial state, we decompactify and homogenize extremely fine sand (average grain-size of about 40μm; grains are non-spherical) by blowing air through it via a perforated bottom plate. The height of the sand bed above the bottom plate...

Thx for reply. I've tried quartz sand with diameter of grains 0,1 mm, but it behaves more like a flour, such as 0,2 mm. With grains sized 0,63 mm the phenomenon isn't observed, too. With further increasing the phenomenon isn't observed. I decided to swap my attempts with quartz sand to attempts...

Hello, guys, I am new here. I'm wondering, what kind of sand should I use to reproduce this phenomenon: http://www.youtube.com/watch?v=X7LpmE9hl-c&feature=related I've tried several kinds of sand, but the phenomenon hasn't observed. What density should sand has? What is the fraction (diametr)...