Stand on a scale. Figure out how much you weigh. Then pick up the airplane and stand on the scale. Subtract how much you originally weighed, and that is the weight of the airplane.
Airplane? What airplane? My paper airplane wings weigh less than 8 grams.
in an airplane
a bunch.
A paper airplane? A 747? Cessna?
lots of kilograms
An airplane's weight ranges from under 1000 lbs to over 500 tons.
5
They can weigh from 3,000 pounds all the way up to over 800,000 pounds.
It usually has to weigh below 60 pounds, but check with the airline for a definite answer
100 pounds
Those seagulls would weigh two pounds whether they were sitting in the airplane or flying in it. This is because they have push the air below them (in the airplane) down with two pounds of force to keep two pounds in the air. So, yes, the seagulls would add 2000 pounds to the airplane's weight.
That depends on the airplane. Corporate jets weigh from around 10,000 to almost 80,000lbs. Jet fighters are usually around 30,000 to 70,000lbs. Airliners are between 100,000 and 1.3 million pounds.