The Airborne Collision Avoidance System II (ACAS II) was introduced in order to reduce the risk of mid-air collisions or near mid-air collisions between aircraft.It serves as a last-resort safety net irrespective of any separation standards.he safety benefits delivered by ACAS are usually expressed in terms of the risk ratio (does ACAS make safety better or worse?). For Europe, ACAS is estimated to reduce the risk of mid-air collision by a factor of about 5 (i.e. a risk ratio of 22%).
Quick Answer. Tungsten is the element used in incandescent light bulb filaments, because it has a very high melting point. Tungsten is a metal with an atomic number of 74, and its atomic weight is 183.84 grams per mole. This metal has a melting point of 6192 degrees Fahrenheit.
Typically credited as the 'inventor of the light bulb', Thomas Alva Edison experimented with thousands upon thousands of alternative filaments to find the best material for a long-lasting, high glow solution.ater, Edison invented a bulb that would not expire for over 1500 hours. Lewis Howard Latimer improved upon Edison's bulb with a new carbon filament which he patented in 1881. Latimer was part of Edison's research team, termed Edison's Pioneers, and in 1882 began to manufacture and distribute his own carbon filaments.