Not all 5 gallon buckets would have the same weight capacity. A common cheap plastic 5-gallon bucket would likely hold over 40 lbs; but age, quality of construction, materials used, and other factors would greatly effect weight capacity.
83.4 lbs - excluding the weight of the bucket !
About 40 pounds not counting the weight of the bucket
NONE! Gallon is for capacity Not weight!
10 trillion dollars
This wall mount is rated by the manufacturer of having a maximum weight capacity of 100 pounds. The maximum weight capacity of the LifeSpan Fitness TR3000-HRC treadmill is 350 pounds.
Empty 2lb
This treadmill has a maximum weight capacity of 200 pounds.
This rack is rated by the manufacturer as having a maximum capacity of 400 pounds of weight.
The Maxicam Spider Rack has a maximum weight capacity of 800 pounds.
If "BB" means air rifles BBs or ball bearings, then the bucket of "BB" will weight a LOT more than the bucket of dry cottonballs.
A gallon of water weighs about 8.34 pounds. If you have a good sized bucket with a gallon of water in it and you put a 5-pound fish in the bucket, you'll have a bucket that weighs about 13.34 pounds (plus the weight of the bucket). That's as long as the bucket doesn't overflow. The fish will (usually) be neutrally bouyant in the water, and it will be essentially weightless in that water. But its weight will add to that of the water in the bucket. No, it won't weigh 15 pounds, but it will weigh in as suggested. However, the weight of the water itself will not change.
The PAC500 has a maximum recommended weight capacity of 200 pounds. You can use this plasma mount with television sets sizes from 32" - 71". Maximum weight capacity recommended by the manufacturer is 225 lbs.