Adjusted cost base (ACB) is an income tax term that refers to the change in an asset's book value resulting from improvements, new purchases, sales, payouts or other factors.
âTornado top wind speeds top 200 mph,â Shaffer said. On the other hand, hurricanes are â75 â 90 mph, usually.â. The tornadoes, he said, are much more destructive in their immediate small area.
And when the wind speeds reach 74 mph, the storm is officially a tropical cyclone, or hurricane. Tropical cyclones usually weaken when they hit land, because they are no longer being fed by the energy from the warm ocean waters.