[disapproval] Several local officials are in jail on charges of colluding with the Mafia. My mother colluded in the myth of him as the swanky businessman. The store's 'no refunds' policy makes it harder for dishonest cashiers and customers to collude. Synonyms: conspire, scheme, plot, intrigue More Synonyms of collude.
increasing number of parachute jumps are in this area. The difference and effects of altitude between 13000ft and 20000ft AMSL is significant and. the question is raised as to where in this range is the risk significantly increased.
Air gets 'thinner' with increasing altitude. That's why mountain climbers sometimes need bottled oxygen to breathe, and why it is so easy to get 'winded' while hiking in high mountains or even visiting someplace at elevation. Atmospheric pressure is around 1,014 millibars (14.7 pounds/inch 2) at sea level. At an elevation of 10 km (6 miles or about 30,000 feet), roughly the height of Mt. Everest, pressure drops to 265 millibars. That's less than 30% of the pressure at sea level! Both atmospheric pressure and the density of air decrease with altitude.