Assume 10 gallons per gallon of water, so 500 pounds. Then add the weight of the stand, the tank itself, the gravel/sand, the ornaments and other accessories plus the fish. You will probably have 750lbs at minimum sitting constantly in one place. Then add your own weight and anyone else that would come over to watch or tend to the fish.
If you want to add a tank to the second floor, your best bet is to judge the integrity of your home. Pick a place that you strongly believe would have received the least bit of traffic over the years. The floor boards/beams are likely to be the strongest here. You will see differences in wear on the floor.
Mercury is the second heaviest liquid per gallon after osmium. Mercury has a density of around 13.6 grams per cubic centimeter, making it heavier than most other liquids.
The door on the second floor of many rural properties was there due to the heavy snow falls that many got in the Eastern parts of Canada and USA. Often you could not get out of your main floor door if the snow storm drifted snow against it. The only alternative was to await a neighbour to come and shovel you out.
Yes they are not that heavy. A typical treadmill weighs as much as a king-sized bed with matress and boxspring, or an average dresser with drawers. Putting a treadmill on the second floor is not dangerous in terms of weight. You should consider the height of the room, and that constant wear and tear on the floor-boards, floor-joists, or cross-beams may create a "noisy" zone in your floor.
My heart felt as if being lifted up on strings by a pulley.
A gallon of water weighs approximately 8.34 pounds (3.78 kilograms) at room temperature.
Floor tilesThe human bodyWindow panes
No. 6 fuel oil has a combustion value of 151,300 - 155,900 Btu/US gallon.
A gallon of jet fuel weighs approximately 6.84 pounds.
20 US gallons of diesel is approximately 143 pounds
There is no such word as "clecious" and I am assuming that it is your attempt at spelling Celsius.The mass of 1 US gallon,of water is approx 8.3 pounds.
Depends on the car. A big fat heavy truck would get about 8 miles to a gallon. A small car 25-35 miles to a gallon.
A heavy-duty electric jackhammer is the best tool for removing tile from a concrete floor.