Missing information. If you drew a right triangle with the airplane at the top of the short side, the base would be the 4 miles on the ground. That angle would be the 29 degree angle. So what are you looking for?
It can be anywhere from 0 to a maximum of about 80,000 feet.
Airplane wings to control elevation.
1
Spektrum DX8 as of right now but soon will be DX18
He is called an "air traffic controller".
yes
It means something is high in the air. A good example of this is a in-flight airplane at a high elevation.
An airplane flying at an altitude of 2600m, approaching an airport runaway located 48km away, is descending at an angle of 3.1 degrees, rounded to the nearest tenth of a degree. Construct a right triangle. Horizontal is 48. Verticle (opposite) is 2.6. Hypoteneuse is 48.07 by pythagorean theorem. The inverse sine of (2.6 / 48.07) is 3.1 degrees.
When an airplane takes off, passengers will feel the acceleration and lift off of the plane as it leaves the ground. Sometimes this can make passengers nervous, or as it receives elevation, it can make peoples ears pop.
Most planes fly in the troposphere anyway but without an altimeter you could take temperature readings as those vary by altitude.
Approaching minimums is called out by an on board computer when the plane is on approach to land. It means that the pilots are approaching the minimum altitude that they can safely fly to without the runway in sight (ie, through clouds and rain etc). If they reach that minimum altitude and the runway is still not in sight the pilots must call off the landing "go around" and attempt the landing again.
You can try dressing up as an airplane, or a traffic controller. Other ideas would be to try dressing as a pilot or a flight attendant.