Tack of Pressure Sensitive Adhesives. Tack, or quick stick, is one of the most important properties of pressure sensitive adhesives (PSAs). The definition of tack is the property of a pressure sensitive adhesive that allows it to adhere to a surface under very slight pressure. It is determined by the ability of the adhesive to quickly wet the surface it contacts.
How far inland can a tsunami go? With wave speeds that can reach as much as 435 miles per hour, a tsunami can travel as far inland as 10 miles, depending on the slope and the shape of the shoreline that it is traveling across.
Tsunamis race across the deep ocean at jet speed, some 500 mph (800 km/h). Near shore, the killer waves slow to between 10 to 20 mph (16 to 32 km/h) and gain height. If the offshore slope is gentle and gradual, the tsunami will likely come in looking like a rapidly approaching tide.