because the water pressure on the damn is much higher on the bottom of it than the top.
They don't "need to be",
but the forces trying to destroy the dam are greater at the bottom of the dam
due to the weight of the water behind it.
The bottom part of the dam has to support (a) more water pressure, (b) the weight of the dam above it.
I can answer it generally. The guages were set up to be the area of sheet metal required to get a certain weight. With thicker sheet metal, you don't need as much area to get to the weight, so the guage number is lower.
As a guideline, 4 inches thick, but it would depend on what is going to be sitting on top of it. You may need thicker and/or to reinforce it with rebar.
Year, Make and model need to be taken into consideration, 18 gauge is about the midpoint, some manufacturers / years may be thicker or thinner. The best way to match material size, is to use a metal thickness gauge on a known, good sample.
You need a divider that is 10 to 1. You could use 10 megohms in the feedback and 1 megohm in the bottom leg. Since you are probably talking about an operational amplifier, you need this in both legs.
ANWER the main purpose is to control the annual floods and to produce electricity
This is because the pressure in a liquid increases with depth. This means that the pressure at the bottom of the dam is more. Hence it is more liable to break out from the dam as more pressure is exerted on the walls. So, the walls are thicker at the bottom.
of course not ! dams need water as the energy to create electricity. Basically water is fuel to create electricity in dams and without it, it is impossible if there isn't any other form of fuel energy provided to dams ...
The pressure of the water (the weight) is greater at the bottom, due to the depth of the water. As the pressure is less near the top, the top of the dam wall doesn't need to be as thick as the bottom of the dam wall.
It wasn't mixed enough when it was first made. If it is made with cubes they need to be thoroughly dissolved and this mixture well stirred before it is chilled. If it is made with powder make sure the powder is well dissolved and stirred before chilling. If the thicker mixture is allowed to settle it will be thicker at the bottom than it is in the rest.
I would suggest you to visit your dermatologist and have your skin tested. I think your suffering from some sort of skin disorder which made your skin thicker without realizing it. Maybe you need some lotion or cream to make it a bit thiner if not try to rub it against the wall. Hope this would help.
Pressure=density*gravity*height In water density and gravity are constant, therefore pressure only changes with height. The dam would need to be thicker at the bottom than at the the top to withstand the higher pressure at the base of the structure.
Because - the deeper you go into water - the higher the pressure. The base of the dam not only has to support the whole structure, but also the weight of thousands of tons of water being held back.
Well ! Pakistan has been facing energy crises for the past 4 years. The electricity produced there does't fulfil the needs. So, they need to build more dams to create more electricity to meet the needs of the population.
100
Since it is dry, the cuticle would need to be thicker to prevent water loss.
Dams are built for a number of reasons, two being:To control the flow of water so as to eliminate floodingTo make electricity using hydroelectric power
shelter, place to live in, a house.