how heavy is a gallon of water,?
488291
Water at sea level weighs about 8.3 pounds per gallon.
347612
1 gallon (gal) = 8.345 pound(water) (lb(water))
425323
a lot!\nwater is really dense, and clouds are composed of water vapor-imagine a steam room, with about 1.5 times more water per unit of volume, then imagine al the water in there times, 10000(at least the size of a big cloud), even if the air weighed 1/100th of a pound, that could would with 10 lbs
443013
It depends on how far out of the water you wish to be.  Humans are very close to being bouyant-we are more dense than water, but have lungs full of air, thus a lean man with a large lung capacity is bouyant with a deep breath.  Its isnt the pounds of air that matter, its the pounds of water displaced by the air.  If you hold onto a 10 gallon jug full of air, it displaces 10 gallons worth of water, which is about 80 pds-well more than you need to keep your upper body above water.  For a 200 pd man, he would need an water-displacing container of 25 gallons (this could be a boat or anything else that displaces water for air).
121559
Buoyancy is basically the weight of the displaced water.  Assuming that a 55 gallon drum displaces essentially 55 gallons of freshwater.  Assuming roughly 8.33lbs/gallon, you would need 458 pounds to counteract the buoyancy.  \n\nYou also need to take into consideration the weight of the drum itself as well, and subtract that from the overall weight needed (provided that you've taken into account the buoyancy of the drum itself on the first calculation).\n\nIf you can get an accurate volume of water displaced by the entire drum if it were submersed, then you can figure the weight of the water displaced, and subtract the weight of the drum from the weight of the displaced water. That will provide you with the weight needed to counteract the buoyancy.
444934
At room temperature, the density of mercury is 13.54562 greater than the density of water, and decreases slightly as the mercury is heated.\n\nA gallon of water wieghs exactly 8 pounds, so a gallon of mercury at room temperature would weigh 13.54562 times as much.
773399
No.. Mercury is heavier than water therefore takes a more significant change to show the same displacement..\n\n1 inch of mercury = 13.6 inches of water
878174
Weight times density yeilds volume. You need it's density before you can compute it's volume.\n\nOnly with materials (like water) where the specific gravity is 1(implying 1ml of water weighs one gram) are you able to convert fluid measurements to/from weight, without explicit multiplication/division.
781338
The density is 0.357 g/mL. This is because specific gravity is the ratio of the density of the unknown liquid to the density of water, 1.0 g/mL.\n\nIf, say, you wanted to know the density of the liquid in pounds per gallon, you would multiply 0.357 by the density of water, which is 8.320 lb/gal
974334
8.34 Lbs/ Gal (waters weight)and\n128 oz = 1 gal so...\n8.34x32/128=  \n2.085 lbs for a 32 oz bottle of water
1066738
Water is 62.4 lbs/cu ft, so it's 1684.8 lbs/cu yd.
208900
Specific gravity.\n\nPure water has a density of 1 (the mass of 1 cubic centimetre of pure water is precisely 1 gramme), if something was twice as heavy as water (i.e. it has twice the mass) it would have a specific gravity of 2, 6 times as heavy and the SG would be 6.  If something was half as light as water it's SG would be 0.5 and so on.
941617
The Specific Gravity of water is 1
1004444
I ug is a 1billionth part of a cubic meter of water\n1m3 of water weighs 1000kg or 1,000,000,000 micro grams
908737
compared to what?\nIt would be buoyant compared to sea water, which is heavier due to the high number of minerals dissolved in the water.\nIt would not be buoyant compared to distilled water, which would be lighter because it has no minerals dissolved in it.
152321
1 gallon of water=8.33 pounds\n\n\nGallons into Pounds: Multiply the specific gravity of the liquid by 8.33* (weight in pounds of 1 gallon of water); then multiply this result by the number of gallons, to obtain the weight in pounds.
1074230
Approx 6 pounds per gallon