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== == Artificial dams such as on a river may have a hydroelectric power plant or station attached to them (unless they were built for irrigation or other purposes). Dams are used to store water so it can be released in a controlled way.
Hydroelectricity is derived from the potential energy that water has when it is at a height above sea level. If you visit a hydro dam you will see one side of the dam holds back water at a high level and the other side has water flowing at a low level. As the water falls to the lower level, some of the energy can be transformed into rotational energy by being directed through turbines.
Electricity is produced by a generator. The generators in a hydropower station are powered by the turbines which are powered by the falling water. As the generator turns it produces electricity. This is called hydroelectricity because its source is water (hydro is ancient Greek for water). The energy for all this originates from the sun, which evaporates water from the oceans, and that then rains or snows into the catchments for the hydro lakes.
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Why is hydroelectricity used more than thermal electricity?
Hydroelectricity is often favored over thermal electricity due to its lower greenhouse gas emissions and cleaner environmental impact. Hydroelectric plants utilize a renewable resource (water) and have lower operational costs compared to thermal power plants that rely on fossil fuels. Additionally, hydroelectric power is more reliable and consistent, as it is not subject to fuel price fluctuations.
If two waves start out in phase with one another but one wave travels half a wavelength farther than the other before they come together will the waves be in phase or out of phase when they combine?
When one wave travels half a wavelength farther than the other, they will be out of phase when they come together. This is because the extra half wavelength causes a phase shift of pi radians, resulting in destructive interference.
Why do bubbles come to the surface?
Bubbles come to the surface due to buoyancy. The gas inside the bubble is less dense than the surrounding liquid, causing it to rise. As the bubble moves upward, it displaces the liquid around it, making room for more bubbles to form.
What are the limitations of hydroelectric energy?
what are the limitations of hdroelectric energy?the first one is most suitable rivers have already been dammed the second one is dams can have negative effects on the environment.
When you are rubbing your hands together can you push harder on one hand than the other?
When you rub your hands together can you rub harder on one than the other? No, for each hand pushes equally on the other in accord with Newtons third law you can not push harder on one hand than the other.
How many jobs are created by a hydroelectricity plant?
I have done extensive research on the job opportunities provided by these dams and other than the construction there is really only one other job. Penis sucking
What us river has more than twenty major dams that have been built on it and its tributaries?
The Colorado River/Colorado River Basin has more than twenty major dams in the river system. However, the Columbia River System has more than four-hundred dams for hydroelectricity and such.
Is hydroelectricity a substitute to fossil fuels?
Yes. If we can use more electricity from dams (hydroelectic power), we conserve fossil fuels. I also note that while hydroelectric is generally better than using fossil fuels, there are a number of disadvantages to hydroelectric power, including loss of land and negative impact on the environment when large dams are constructed. See related links.
What will happen in the year 2300?
That cannot be said with certainty. In the year 2300, there may be more buildings than now. A lot of electricity will come from hydroelectricity or geothermal energy.
How many dams in the world?
There are least 48,000 dams in the world that are more than 45 feet tall. Almost half of these dams are in the nation of China.
What are some ethics about hydroelectricity?
its proven that it is more harmful to not use it than to use it
Are their dams in botswana?
on the Metsemotlhaba River, for example, there more than 700 small dams serving a variety of purposes
Is one large dam better than two or more small dams?
The answer depends on what you mean by "better", in other words, what your purpose is. The answer also depends on the dam sites and other factors such as construction cost. Lets assume you are talking about dams on a uniform valley, and that we ignore other factors such as construction expense. If the dams are to control erosion, then probably two dams are as good as one. If the dams are to provide a reservoir of drinking water, then its easy to see that one dam holds more water: just think of replacing the downstream small dam with the big dam (whose top is at greater elevation than the top of the upstream small dam) and you can visualize it holds more water than the two small dams.) If the dams are to generate electricity, then loosely speaking, one large dam is equivalent to two small dams. This is true only if the water of the lower dam reaches the base of the upper small dam. Then the equivalent volume of water goes through both the pair of small dams and the large dam, and the sum of the heads of the two small dams equals the head of the large dam, so the generated electricity is the same.
Why is hydroelectricity better than normal electricity?
hydro electricity is better than normal electricity because it is cheaper.
How many water dams?
Dams in AmericaThere are an estimated 75,000 dams in the United States, blocking 600,000 mi (970,000 km) of river or about 17% of rivers in the nation.
What state in the US has the most dams?
The most productive by far is the hoover dam, which in theory could run several months with no one to watch or look over it. If people suddenly dissapeared off the face of the Earth it would be the last place giving off power. (quite possibly)
Does Mississippi River have a dam built on it?
none There are probably about 29 dams.
