That would depend on the exact fighter . Some of the modern fighter aircraft can fly 50-60 thousand feet some will fly even higher . Most of the countries with new fighters will not reveal the ceiling they can fly at .
A good example is the Russian Su 35 or the MiG 31 may have a max flight as high as 80-100,000 ft but they don't want us to know about it .
Most of your fighter aircraft would stay in the 0-40,000 ft range where the air is thicker and control surfaces work better .
The fly and then they shoot (:
If you mean fly on thermals like some gliders, NO.
they fly almost above 15km, where atmospheric pressure is very low.
The fly on the same principle as any aircraft the difference being they are propelled by jet rather than propeller.
It's different for each type of "fighter" jets but it's roughly around 50.000 - 65.000 feet (15.000 - 20.000 meters) for fighter jets. Google it if you want specifics, it's called "Service Ceiling".
over 2500 fighter jets
They do make noise. If they fly very high, then you can't hear them.
Some models of fighter jets have flown suborbital trajectories with apogees above 50 miles (80.47 km).
Most fighter jets are made of aluminium, titanium and steel.
No. The fastest wind gust ever recorded in a tornado was 302 mph. By comparison, commercial jets regularly fly at 500 mph. Some fighter jets can fly at over 1,000 mph.
They fly in air. High-performance military fighter jets have engines powerful enough that they can fly straight up, like a 'rocket ship'. But aside from those, all airplanes need air in order to remain aloft.
depends what type of MIG your talking about