Acquired Reactive Perforating Dermatosis Last updated July 12, 2017 Reactive Perforating Collagenosis (RPC) is a very rare skin disorder that can manifest during early childhood or adulthood.
Fog is a mixture because it is an aerosol of water droplets or ice crystals in air. Fog can also contain molecules of acids or ammonia. Continue Reading
In the UK the definition of fog is visibility less than 100 metres (for driving purposes, UK Highway Code rule 226), while for pilots the distance is one kilometre. Otherwise it is known as mist. Mist makes a beam of light visible from the side via refraction and reflection on the suspended water droplets. Scotch mist is a light steady drizzle. Mist usually occurs near the shores, and is often associated with fog. Mist can be as high as mountain tops when extreme temperatures are low.