If you are referring to a drone used in the military, the most popular drone, the MQ-9 Reaper flies at around 360 mph.
Ramjets work with an air intake speed of, usually, 400mph+ but scramjets require supersonic air speed to function.
It depends on the model of the Royal Air Force fighting jet that you are asking about. But the Eurofighter Typhoon jet, has a top speed of 1,320mph.
It depends entirely on the speed of the jet.
A Scram jet is a jet which needs supersonic propulsion to take off. It is taken into air by another larger aircraft and is released in supersonic speed.
Has no pilot.
Propulsion is what keeps a jet in the air. Otherwise the plane has to fall down. Propulsion keeps the air always flowing over the wing which in turn keeps the plane afloat.
it depends what jet.
According to the Encyclopedia of World Air Power the fastest fighter jet is, The F15: Mach 2.5, approximately 1,400 mph.
air and combustion gasses moving at great speed and elevated pressure.
Jet streams give off chemicals that penetrate the air and trickle down to where we breathe. Streams also affect the weather because of the jets high speed, potentially causing storms and tornadoes if two jet streams intersect.
Jet Streams
It is known as the Jet Stream.