Most children of school age who wet the bed at night have what doctors term primary enuresis.. They have never had nighttime control of their bladder. Family history plays a role, too, in incontinence in children. If you wet the bed as a child, don't be surprised when your child does, too.
One thing to notice is that if you put a gallon of air on a scale, (in a wieghtless container, of course) you would measure zero, exactly. That's because the buoyancy caused by the surrounding air exactly counteracts the weight of the air in the container. If you pressurized the air in your gallon container to, say ten times the outside pressure (or 147.0 psi absolute, or 132.3 psi gauge) it would now weigh nine times 0.01, or 0.09 lb.
Gallons measure volume and grams measure mass (weight, in common parlance) so they're not interchangeable. It's a bit like asking what your height is in pounds. Water (the usual standard) weighs 1 kilogram per liter so a gallon, which is about 3.78 liters, would weigh 3780 gm. However a gallon of cooking oil would weigh less because it's less dense, while a gallon of mercury would weigh a heck of a lot more. 10 people found this useful.