If you are referring to the ones where the elastic helps to keep it in place, good luck to you! I've not seen them around for years. But, here's an idea that worked for me. I took the flat top sheet and stitched the edges directly onto those of my bottom fitted sheet. this way when the fitted sheet is in place, the top sheet is in place as well. Start at knee level stitch it all the way around the foot and up the other side to the same level. It's less expensive and worth a try!
I believe there are 9 corners. The 8 on the bottom and the vertex at the top.
The definition of elastic vibration was found in the website at the bottom. Elastic vibration is oscillating movement of a solid object in which a large majority of the energy is retained though elastic forces and with inertia of the object.www.answers.com/topic/elastic-vibration
In corners or at the bottom of a tree.
a pyramid with a square bottom
Because a cone does not have corners on its base and sides, it has a rounded bottom.
2,the top and the bottom
No, but you can remove the bottom and make an elastic part so they can fit.
the "stretchy stuff" at the bottom of jackets, and on the top of underwear, the cuffs of some jumpers, etc. is called elastic
Square have seven symmetry line is from corners to corners sides to sides and from up to bottom there is other symmetry line in four dimension
A cube has 8 corners. Four on the top and four on the bottom.
The most common shape for a bicycle frame is pretty much triangular. One main triangle with the bottom bracket, fork and seat post at separate corners. Then there is the rear triangle, with rear Wheel, seat post and bottom bracket at the separate corners.
All I can tell u is that I have one just in case u r looking for one.