Basic Statistics for Epidemiology: Prevalence vs Incidence. In short, epidemiology is sort of the who what, when, why, how and where of disease. It doesnât involve any experimentation or clinical trials, so it is really of interest to public health, because it is just about what happens.
So if a queen-sized waterbed with a bladder-type mattress holds roughly 130 gallons of water that weighs in at 1,084 pounds plus the weight of the frame and two people.o keep the math simple let s assume that the mattress, frame and two adults weighs 1,300 pounds and that the bed assembly measures six feet by six feet taking up a total of 36 square feet of floor space. If we divide the weight of the bed by 36 the square footage-that gets us to 36 pounds per square foot.
Rating Newest Oldest. Best Answer: Actually, a 55 gallon aquarium, with just water, weighs about 625 lbs. and then you need to add probably 60 lbs. for gravel and a little more for decorations. How much depends on whether they're plastic or real rock, etc.5 gallon tank filled would have a total weight displacement of 458.15 lbs + tank weigh of about 165 lbs= 625 lbs. http://freshaquarium.about.com/cs/tipsan... That much weight is considerbly less then say a waterbed which you can find on many second floor places.