Answer: The answer to this one is no. Yes a plane does have to be traveling at a certain speed in order to lift into the air. But as long as the aircraft maintains that speed it can either climb or descend. The speed merely determines how fast it climbs.
Answer: what type of motorcycle is it? if it is ghost riders bike than definitely the motorcycle but if its just a normal motorcycle against a normal plane and you are still wondering than go to any elementary school and pull out any 1st grader and ask them and I guarantee they will give you the right answer because this is common sense.
Does a plane flying against a jet stream travel faster than a plane travelling with a jet stream?
Answer: A lot. Way to much to list here. A huge jumbo plane has vast complex systems that the pilot monitors in order to keep the plane flying. For large a/c you need to be certified to fly individual ones.
Answer: I am assuming you are talking about Netflix. If you are, they are hoping to remove all physical DVDs and go totally streaming in the next few years. So, just give it about a year or two to get a substantial amount.
Answer: Very little effect at all. If the cannon is firing rapidly, the vibration of the gun can be transmitted to the airplanes structure. A cannon bullet is very small in size and mass. On the other hand, the Jet has a very large mass. The Laws of Physics would show that the small mass would not be able to change the momemtum(or velocity) of the larger Jet.
Answer: You can fly at any age. Under 12, they may want a flight attendent to "hold your hand" so to speak.
Added: There is no explanation as to why, but the key phrase in your question is "you are not legal in the US." EVERYONE is subject to going through customs and immigration checks as they enter the US, regardless of WHY they are trying to enter the country. During your passport check when it is found that you are "not legal" you will be denied entrance.
Answer: The flight level of a plane depends on many factors. Flight levelsmust differ in order to avoid air collisions. The type of aircraftmay also come into play, as some planes can handle higher altitudesthan others.