From 1.07 lb/ft for DKW with wall thickness 0.042" to 2.06 lb/ft for Type K with wall thickness of 0.083"
Depends how long it is
40
its 10000kg
Yes.
It would weigh about 14.3 pounds .
A boy that is 4 foot 9 inch should weigh between 30 to 40 kilograms. This is the ideal weight but it varies in most cases.
Nothing--in space
100-115
152 pounds
125 lbs
500 / (16 x 12) = ~2.604 gallons/inch
2000 Gallons