998.8 lbs.
About 9171 pounds if the water is at 4C, a little less if the water is hot. You did not give the weight of the empty spa so you would have to add that to the weight of the water provided.
About 8,040 liters.
THE GALLONS have NO Bearing on the pressure it would have to do with the HEIGHT and then if you wanted to know the WEIGHT you would take the 1,500 gallon and times it by 8.33
One square foot of water that is 1 inch deep weighs approximately 0.578 pounds. This is calculated based on the fact that 1 cubic foot of water weighs about 62.4 pounds, and since there are 12 inches in a foot, 1 inch of water in a square foot amounts to 1/12 of a cubic foot. Thus, the weight is 62.4 pounds divided by 12, which equals around 5.2 pounds per inch, and for 1 square foot, it totals to approximately 0.578 pounds.
About 235 pounds. To figure that, find the volume of the pool in gallons (pi X radius squared X height) and multiply the answer by the approximate weight of a gallon of water (8.3 pounds). Hope that helps.
The water pressure at 20 feet deep would be approximately 8.6 pounds per square inch (psi). This pressure increases by 0.43 psi for every additional foot in depth due to the weight of the water above.
A one by one by two meter tub has a volume of 2 square meters or 70.63 cubic feet. Such a volume will contain 528.3 gallons of water. At 8.345 pounds per gallon, the water in the tub will weigh 4409 pounds.
The weight of the block at the time of the drop would ensure that the block goes into the water pretty deep depending on the size and weight of the block. After going into the water in the first instance, it would then float.
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)
142794 Pounds if it is 4 ft deep 107230 if it is 3 ft deep.
At 5000 feet deep, the water pressure would be approximately 2200 pounds per square inch (psi). This pressure increases by about 14.7 psi for every 33 feet of depth due to the weight of the overlying water column. This high pressure makes it challenging for humans to dive to such depths without specialized equipment.
Water pressure at a depth of five miles (roughly 26,400 feet) in the ocean would be around 589 atmospheres, which is equivalent to 583 times the pressure at the surface. This extreme pressure is due to the weight of the water above that depth.