What Is a Social Security Number (SSN)? A SSN is a nine-digit identifying number is in the format xxx-xx-xxxx. Any individual who is a U.S. Citizen, a permanent resident, or a temporary alien resident who is authorized to work in the United States, must have a SSN.
The most common cause of a flat tire is puncturing of the tire by a sharp object, such as a nail, letting air escape. Depending on the size of the puncture, the tire may deflate slowly or rapidly.
Iron deficiency (Anemia). Anemia or iron deficiency may also be an underlying cause of cracked nails. Iron helps the body in producing hemoglobin, the oxygen carrying part of RBCs. A deficiency of iron can lead to cracked nails for the blood oxygen does not completely reach the nail bed.enerally, maximum non-medical causes of cracked nails are associated with over exposure of nail to harmful chemicals and water. This leads the nail to lose the moisture barrier and natural oils. Many times, low humidity levels in winters plays an imperative role in robbing the essential moisture from nails.