As airplane is flying at 800 km/hour. No-slip boundary condition ensures that the velocity of a fluid particle on the airplane surface is km/hour to an observer on the ground.

current and voltage can both be different in different parts of a circuit so it matters where you place the ammeter and voltmete

so easy. just google the electromagnetic waves and it’ll pop up.

the ima (higher than 1m) will be greater than the ima with the height of 1m.