Because it will make the flight attendants very annoyed if there isn't an emergency, and during an emergency it may make it difficult to maneuver in the airplane and get out of the exit.
None - the life-jacket should be the outermost layer - since you may need to inflate it to keep you afloat !
It should have three tags and first one should have a rn number in back 112170 if not fake this tag by the way is located inside ur jeans or jacket.
You should inflate your bike tires to the recommended pressure level indicated on the sidewall of the tire.
Your shoulder should not bulge the top of the sleeve. If your partner pats the tops of the sleeves at the shoulder they should feel your shoulder but not see it. Second, the sleeve of the jacket should let a bit of shirt cuff show. Maybe 1/4 to 1/2 inch. As to length, if you roll your fingers (not a fist) with your arms hanging at your sides, the bottom of the jacket should reach into the inside of your fingers. And the jacket buttoned should be able to be pulled away from your belly an inch or 2. Some play.
Aeroplane doors should not be opened during flight. I think one of the reasons has to do with the stability of the aircraft. An aeroplane inside is isolated from the outside. There is no exchange of pressure between the outside and the inside. Pilots are able to control the aircraft using elevator, ailerons, rudder, spoilers etc. When you open the door, then another fact that need to be controlled is introduced in the equation - pressure difference. Unfortunately such kind of pressure difference together with high speeds and high altitudes makes it impossible for the pilots to control the aircraft anymore.
A damaged life jacket should be replaced.
No, a DAB radio should not be used in an aeroplane. It can cause the aeroplane computer equipment to malfunction, however, a DAB radio is "allowed on" an aeroplane, but it will probably be checked to make sure it is not a bomb! :D
a jean jacket!
5 to 2 should do it!
10-15C thick jacket 15-20 thin jacket
Get a jacket.
You should study Aeronautical Engineering or Aerospace Engineering.