Why the earphones in the pocket always form knots? How to explain this problem in Maths?
23468
Why do earphone wires always get tangled up in pocket?
143717
Why/How are there infinite points in a line segment?
125661
Two problems about rings.
141835
Rigorous Proof: Circle cannot be embedded into the the real line!
35906
Calculate force of electric charges "suspended" by strings
142670
Gauss Law Question. Could anyone explain to me why does S3 is 0 in this lecture note example?
126957
Why does the comb attract the pieces of papers if they're neutral?
117347
Android - exact mathematical calculation
119058
Strange phenomenon with Outer
122670
Explanation for $E~$ not falling off at $1/r^2$ for infinite line and sheet charges?
62191
Do particles in a sound wave ever move transversally?
137426
Plastic part on the tip of a shoelace
66444
Why doesn't the "zig-zag" comb deformation retract onto a point, even though it's contractible?
2752
Is there any way to generalise this problem?
98953
How to say that the phone is held between shoulder and ear?
41726
Musical and combinatorial proof
82748
Modelling a spiral around a sphere