Sure. Air Force pilots do it fairly frequently.
no
About the same speed as through water (about 3300 mph).
We can use ultrasonic planes. They can travel with that speed.
Answer"Mach speed" refers to the speed of sound in earth's atmosphere. Mach 1 is the the speed of sound, Mach 2 is twice that, and so forth. A human can travel at any Mach speed at all. Your question fails to specify whether or not surviving the experience is a requirement. AnswerA human can travel at any Mach speed he/she wants. In orbit, the Space Shuttle travels at speeds well over Mach 30. It is the G-force which causes people to pass out. G-force is caused due to acceleration, not speed. A force of 5G can make a fit person pass out.
The speed of sound is faster then the amount of speed a sneeze can generate. The speed of sound travels 741mph while the information that is provided shows a sneeze can travel up to 100mph.
Speed has nothing to do with where you are. You can travel below the speed of sound pretty much anywhere.
There is currently no commercial airliner which can travel at that speed.
At the temperature of 20°C the speed of sound is 343 m/s.
The sound barrier
No. Light travels at about 875 thousand times the speed of sound.
the sound carriers inside of a soundwave that travel at the speed of sound
They don't really travel at the same speed, but, on television, the distance they travel is so short, that the difference between the speed of sound and the speed of light is almost non-existant.