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Median aerodynamic diameter (MAD) is one of two parameters influencing the deposition of inhaled particles. The other is the geometric standard deviation of the particle size distribution. The MAD is the value for which 50% of some quantity in a given aerosol is associated with particles smaller than the MAD. The term is used to describe particle sizes for which deposition depends chiefly on inertial impaction and sedimentation. It is also used to refer to particle sizes that are too large to be deposited by gravity. It can also refer to smaller particles that are not too small to be depositionable by gravity but too big to sink.
Movies & TV shows
A group of adolescents break into a theme park. The group believes that there are no ghosts, set at a time before the horror stories from the Highland Tower case. They challenge each other to a spirit...