Spin is an intrinsic property of subatomic particles, similar to their mass and charge. It refers to the angular momentum of a particle, which can either be spin up or spin down.
No, not all positively charged particles have the same spin direction. In fact, there are a variety of particles with positive charge that have different spin directions, such as protons, positrons, and alpha particles.
Spin direction is determined through experiments and observations. Scientists use high-energy particle accelerators to study the behavior of particles and measure their spin direction.
No, spin direction and spin angular momentum are not the same thing. Spin direction refers to the orientation of a particle's spin, while spin angular momentum is a quantized value that describes the magnitude of the particle's spin.
Yes, spin direction can change in a particle. This can happen through interactions with other particles or through external forces, such as magnetic fields. However, the total spin angular momentum of a particle is always conserved.