Primary waves travel through Earthâs crust at an average speed. of about 5 kilometers per second (3 mi/s). Primary waves can travel. through solids, liquids, and gases. As they pass through a material, the. particles of the material are slightly pushed together and pulled apart.
Why This Occurs. Emotional detachment is usually an issue caused by severe, intense anxiety - most notably panic attacks, although any form of severe anxiety can cause emotional detachment. While it's not entirely clear what causes this detachment, it most likely is a coping mechanism for the brain.
Posterior vitreous detachment (PVD) is a change in your eye which does not normally cause sight loss. It is very common and most of us will develop it at some point in our lives. Although it can cause some frustrating symptoms, PVD doesn't cause pain, harm your eye, or change the way your eye works.