RE: What Fuel tubing to use inside gas tank
scratchonly ,
"Everything does not fall at the same speed due to gravity; drop a feather and a rock and see which drops faster."
you were obviously asleep in physics class.a feather has resistance to the air a rock does not,in a vacum they will fall at the same rate.
the rock if it weighs more than the feather(mass)will have more energy than the feather