There have been there have been 112 known F5 or EF5 tornadoes based on records since 1880. However, the number in older records is likely higher. It is very difficult to tell the difference between F4 and F5 tornadoes based on old records, and in the case of uncertainty an F4 rating is given.
There have been many F5 tornadoes. See the link below for a list.
A little more than 1% of tornadoes are rated F4 and F5 with F5 tornadoes being less than 0.1%
Tornadoes fluctuate in intensity. An F5 tornado is only at F5 strength for part of the time it is on the ground.
Oklahoma has had the most F4 and F5 tornadoes. Though it is tied with Texas, Iowa, and Alabama in terms of F5 tornadoes in the past 60 years.
Yes. There have been documented cases of F5 tornadoes and some F4 tornadoes tearing asphalt from roads.
If you are referring to the diameter of an F5 tornado then there is no definite answer. Size is not a factor in rating tornadoes. Tornadoes are rated based on how bad their damage is. In the case of F5 tornadoes, that means houses must be completely swept away. F5 tornadoes have been recorded at a variety of sizes ranging from 60 yards to 2.3 miles.
There were no F5 or EF5 tornadoes in 2010.
There have been estimated at least 109 F5 tornadoes in the U.S. Since the introduction of the Enhanced Fujita scale there have been 9 EF5 tornadoes, which is essentially equivalent to an F5. Note that this number should be taken with a grain of salt as it can be difficult to distinguish between F4 and F5 damage, especially in records that must be evaluated based on historical accounts.
It is not so much the biggest but the strongest tornadoes that are rated F5. The Fujita scale rates tornadoes from F0 to F5 based on how severe their damage is. F5 damage is the worst, it is complete destruction. F5 tornadoes tend to be very large, but aren't always. Size is not a factor in assessing tornado strength.
There have been several dozen F5 tornadoes since record began in 1950. F5 the highest level on the Fujita scale which runs from F0 to F5 and rates tornadoes based on the severity of the damage they cause. A rating of F5 denotes an extremely violent tornado that rips houses clean of their foundations. F5 tornadoes are typically large and have been known to destroy entire towns. They are absolutely devastating. The majority of the most famous tornadoes were F5's, though a few F4 tornadoes have made it onto the list.
About .05% of all tornadoes are rated F5 or EF5. Or, in other terms, about 1 tornado in every 2000.
There have been dozens of F5 tornadoes, you will need to be more specific.