A cubit is approx 18 inches so the question is about an area of 18 square inches. That is not a measure of volume and so there can be no water contained in it.
A cubic inch, on the other hand, is approx 16.39 cubic centimetres or 16.39 millilitres.
144 cu. in.
taking the normal density of water as 1g/cc, the amount of water in 1 cubic inch would be 16.387064 grams. Addition about 1 cubic inch.
A lot
None. A square inch has no volume.
It is 67.5% of one inch.
One psi (pounds per square inch) is 27.7 inches of water. An inch of water is a unit of pressure which will raise water one inch. A cubic inch of water weighs 0.0361 pounds, so one psi is one over 0.0361 or 27.7 inches of water.
The question as posed is unanswerable. In order to compute the weight of an inch of water, one would have to know the volume, or area the one inch covers. (ie., a square foot of water one inch deep would weigh=X)
One square inch
About 0.42 ounces. Specific gravity (compared to water) about 0.73
A two inch pipe can hold 0.1632 gallons per foot. It takes slightly over 6 feet of two inch pipe to hold one gallon of water.
One inch = 2.54 centimeters
It depends on how fast the water is flowing. There isn't enough information to solve this.