Bioengineering and biomedical engineering merge the disciplines of engineering, biology, and medicine to create techniques and devices that are based on an understanding of living systems and serve the objective of improving the quality of human and animal life.
Weight of 1 US Gallon of water = approx. 8.35 lb (about 3.785 kg). Weight of 1 Imperial gallon (i.e. UK measure) of water weighs 10 pounds (4.536 kg) by definition, at a specified temperature and pressure.
One gallon of water, at 20 degrees Celsius, weighs 8.33 pounds. A general rule of thumb used by cooks is A pint's a pound the world around.. There are 8 pints in a gallon and a gallon weighs about 8 lbs. A pint is not exactly a pound but unless you are dealing with a lot of water it won't make much difference. As stated above a gallon (8 pints) weights 8 1/3 lbs. 3 gallons (24 pints) will weigh 25 pounds, 1 pound more than you would expect.