Light coming from the fish under water deviate from its original path due to refraction phenomenon and its image is displaced from its actual position. The image of fish is appeared at shallower depth than its actual depth
When light travels from water to air, it changes speed and direction due to differences in optical density. This causes the light to refract, making objects appear higher or shallower than they really are when viewed from the surface. So, the fish might look shallower in the water due to this bending of light.
The equation to calculate water depth is: [ Water Depth = Volume of Water / Surface Area of Water ]
Water particles move in circular orbits as a wave passes by. The orbit diminishes in size with depth, becoming negligible below a depth equal to half of the wavelength. The particles return to their original position once the wave passes by.
The amplitude of a water wave is the maximum displacement of a water surface from its undisturbed position. It represents the height of the wave crest or the depth of the wave trough from the equilibrium level of the water.
The relationship between water depth and pressure is linear. As water depth increases, the pressure exerted by the water also increases. This relationship is described by the hydrostatic pressure formula, which states that pressure is directly proportional to the depth of the fluid and the density of the fluid.
Light coming from the fish under water deviate from its original path due to refraction phenomenon and its image is displaced from its actual position. The image of fish is appeared at shallower depth than its actual depth
When light travels from water to air, it changes speed and direction due to differences in optical density. This causes the light to refract, making objects appear higher or shallower than they really are when viewed from the surface. So, the fish might look shallower in the water due to this bending of light.
The pressure inside an inverted hollow cylinder in water is equal to the pressure at the depth of the cylinder's centroid multiplied by the specific weight of water. To calculate it, use the formula: pressure = (specific weight of water) * (depth of centroid of cylinder).
Depth of water
The calculation for an oval pool is: Length x Width x Water Depth x 5.9 = Total Gallons Please note that the water depth is the ACTUAL water depth, not the wall height (the water is typically 6" lower than the wall). For your example, let's assume an actual water depth of 3.5 ft: 30 x 15 x 3.5 x 5.9 = 9,293 gallons or about 9,300 gallons. Hope this helps ... http://www.poolspa.com/calculator/
The calculation for a ROUND pool is: Diameter x Diameter x Depth X 5.9 = Number of Gallons For example: For example, the volume of a 15-foot round pool with an actual water depth of 3 ft is: 15x15x3x5.9 = 3,982 gallons. Please note that the DEPTH is the ACTUAL water depth NOT the height of the pool wall (the water is usually around 6 inchs lower than the wall height). Hope this helps ... http://www.poolspa.com/calculator/
If a person looks at a straight object, such as a pencil or straw, which is placed at a slant, partially in the water, the object appears to bend at the water's surface. This is due to the bending of light rays as they move from the water to the air. Once the rays reach the eye, the eye traces them back as straight lines (lines of sight). The lines of sight (shown as dashed lines) intersect at a higher position than where the actual rays originated. This causes the pencil to appear higher and the water to appear shallower than it really is. The depth that the water appears to be when viewed from above is known as the apparent depth.
The equation to calculate water depth is: [ Water Depth = Volume of Water / Surface Area of Water ]
To find the difference between the initial and final depth of water is to subtract the final depth by the initial depth. The initial depth of what is what the water depth starts at and the final depth is the depth of the water once it is finished filling up.
For a round above ground pool, the calculation is: Diameter x Diameter x Depth X 5.9 = Number of Gallons Please note that the depth is the ACTUAL water depth NOT the height of the pool wall (the water is usually around 6 inchs lower than the wall height). For your example: For a 24-foot round pool with a actual water depth of 3.5 ft: 24x24x3.5x5.9 = 11,894 or around 12,000 gallons.
Water depth
To find the depth of a bowl, you can use a ruler or measuring tape. Place the ruler vertically inside the bowl, ensuring it touches the bottom, and measure from the bottom to the rim. Alternatively, you can fill the bowl with water to a known volume, then measure the water level to determine the depth indirectly.