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.
The weight of gasoline is dependent on the temperature, as mentioned above, but it also depends on how much alcohol has been added. Today, that's sometimes a lot. So we come up with 1 gallon of water equals 8.33 lbs. 1 gallon of gasoline equals 5.8 to 6.5 lbs.1 gallon of ethanol equals 6.59 lbs.he weight of gasoline is critical in doing weight and balance calculations for aircraft. For aviation fuel, which is similar to automobile fuel, the weight is 6 pounds per gallon. Jet A fuel, which is closer to kerosene, is 6.84 pounds.