The clotting process is encouraged by certain blood particles (platelets and plasma proteins). Hemophilia occurs when you have a deficiency in one of these clotting factors. Hemophilia is inherited. However, about 30 percent of people with hemophilia have no family history of the disorder.
A rendering of the magnetic field lines of Earth's magnetosphere. A magnetosphere is the region of space surrounding an astronomical object in which charged particles are controlled by that object's magnetic field. Near the surface of many astronomical objects, the magnetic field resembles that of a dipole.
The magnetic field produced by the magnet then is the net magnetic field of these dipoles. And, any net force on the magnet is a result of adding up the forces on the individual dipoles. There are two competing models for the nature of these dipoles. These two models produce two different magnetic fields, H and B.