Living in Rural Alaska is very expensive because of it's isolated location. It would be even more expensive if energy, mail service, and other services were not subsidized by the state of Alaska. In the late seventies and early eighties, the state of Alaska looked for ways to cut the high cost of subsidizing diesel fuel for generating electrical power to rural Alaska. It was during this time that wind energy was taken into consideration as a source of electrical power. The earliest known uses of wind power date back to 3000 BC, when people used wind to sail ships. Approximately 4000 years later, windmills were used in Europe to grind tobacco, wheat, and other grains. Later, in the 1700's, windmills were then used to pump water. It was not until the 1900's that wind mills were used for generating electric power. In the United States, windmills were used prior to widespead electrical distribution. The generation of wind can be traced back to solar energy. It is ultimately a renewable and clean energy source. This is what makes it attractive to many as a source of energy for power plants. Wind is created as a result of pressure differences in the atmosphere which is caused by temperature differences of radiating solar energy. Other factors that contribute to the flow of air (wind) is the rotation of the earth, and it's terrain. We could expect more wind over bodies of water since water provides less resistance to wind than do objects on the surface of the earth. If wind is essentially free, why don't we see more windmills? The reason is that wind doesn't blow whenever we need power. Wind energy can only be stored in batteries and much of the energy from wind can not be harnessed into useful energy. The public also views wind generators as an eyesore on the landscape. Wind, initially is in the form of kinetic energy, thus it has the equation: 1/2mv^2, where m is the mass, and v is velocity of the air. Using the fact that the mass is equal to the volume times the density, we can rewrite the equation for kinetic energy as k.e. = 1/2Vpv^2, where V is the volume, and p is the density of air. Furthermore, the volume through a surface is equal to the area of the surface times the velocity of the air, times the time, thus the equation becomes k.e. = 1/2pv^3At, where A is the area of the surface and t is the time.
Its most known process of generating electricity would be movement of air through wind turbines. Wind power has two parts, mechanical and electrical systems. Mechanical systems are low speed and are used for mechanical tasks such as pumping water or grinding grain. Electrical systems are high speed and are used to generate electricity to power homes or schools. Many people feel that wind farms full of turbines, are aesthetically unpleasing, but wind power is a clean energy source and does not generate greenhouse gas emissions. It is a very abundant resource throughout the United States. Wind power is simple, relatively cheap, and low maintenance (Sambu). Wind power is again, free and very abundant so no matter how much we use now, we will still obtain enough in the
The windieness can affect how a ball moves too. For example think about dropping a ball.Dropping the ball when the wind is really strong, the ball will not fall in the exact spot as the ball would have if the wind was not strong.
I think this because as the surface area increases, the speed of the reaction will increase therefore the gas will be produced faster. I believe this because most chemical reactions happen faster when there is more of the reactant to react with. When there is a larger surface area, there is more of the reactant available, which makes it easier for them to react together. Usually, when the surface area is doubled it will double the rate of reaction.
To investigate the relationship between the air pressure in a ball and the bounce height of that ball where the drop height (gravitational potential energy), temperature and location are kept constant.
Wind Energy is a viable industry that has become a valuable energy source. The energy generated from wind is clean and efficient. The wind energy industry helps to ensure that electric demands are met, wildlife impact is minimal, the environment is not devastated, as well as creates new jobs during the construction of wind farms, daily operations, manufacturing components, and exporting components to foreign countries.
where p is the density of the fluid (in runner’s case: air); v is the velocity of the runner; A is the cross-sectional area perpendicular to the runner’s velocity; and D is the dimensionless quantity called the drag coefficient.
Just as long as wind continues to blow and the sun shines, then wind power can produce energy to send to many different areas. There aren’t many locations that have continuous wind. And because of that, the widespread development of wind power isn’t as great as it could be. Although there are more advantages than disadvantages when it comes to this energy source, the disadvantages should be taken just as seriously. Wind power can harm animals, there was a study that stated birds were coming in contact with turbines and dying.
Also V1-V4 is the effective swept volume where the fresh air from atmosphere is sucked in. The effective swept volume V1-V4 control the mass of air flowing through the compressor.
Winds are caused by the irregular heating of the atmosphere by the sun, the variations of the earth's surface, and rotation of the earth. This wind flow, or kinetic energy, when "harvested" by modern wind turbines, can be used to generate electricity. There is an abundance of wind to meet our needs, “the potential of [the total] wind power [in the world] is. 20 times more than what the entire human population needs” (Maehlum). Currently, wind power is one of the lowest-priced renewable energy technologies available, costing between four and six cents per kilowatt-hour, depending upon the wind resource.
Air is composed of molecules. Air is matter. It has mass and takes up space. Air is composed of different gases such as nitrogen, oxygen, carbon dioxide, water vapor, and other gases. Air molecules are in constant motion. As they move, they come in contact with surfaces. Air molecules push and press on the surfaces they contact. The amount of force per unit area that air molecules exert on a surface is called air pressure. (What is Air Pressure 6) Air pressure is caused by all of the air molecules in the Earth's atmosphere pressing down on the Earth's surfaces. We can measure air pressure to help us predict weather conditions around the world. Temperature also affects air pressure because air contracts when it cools and expands when it is heated. So if air above a region of Earth cools, it does not extend to as high an altitude as the surrounding air. In this case, its pressure at higher temperature is lower than in the surroundings even when the pressure at the surface is the same as in surrounding areas. Then air flows into the cooler region at high altitude, making the total weight of air above the region greater than in the surroundings. This is a "high". The cool air descends to the earth's surface. Near the surface, the falling air spreads out,
Wind turbines are a great source of energy around the world. Wind turbines produce wind energy that can be used to power our homes. Wind turbines convert kinetic energy into mechanical power. Then this mechanical power gets generated into electricity. Wind turbines make energy by the wind turning the large blades, which spin a shaft that is connected to the large blades, which then operates the generator making electricity.
The wind is an incredibly valuable renewable energy source and is in the forefront of renewable energy developments. It is used to convert wind energy into energy that can be harnessed and used via a variety of methods, including; wind turbines, windmills, sails and windpumps. For a renewable energy source, however, it is wind turbines that are used to generate electricity (see figure 1). Wind power has been used for this since the end of the nineteenth century, after Professor James Blyth of the Royal College of Science and Technology first attempted it (Boyle, 2012). However, It wasn’t until the 1980s that using wind power technology was sufficient enough to experience a rapid growth of the technology.
Wind is a form of solar energy. The term wind energy describes the process by which the wind is used to generate electricity or mechanical power. Wind turbines convert mechanical energy from the wind into electrical power. Wind turbines usually have three main parts. There are blades that connect to a central hub, a box behind the blades that contains the generator, and a long stem that connects to the ground. The way how it works is that the wind turns the blades, which spins a shaft that connects to a generator making electricity. After the electricity is produced it is sent through transmission lines to a substation that is sent to business and homes. For the sake of our planet, we must promote a renewable energy economy. Wind power can be a foundation of that sustainable energy future because it provides jobs in states that are building wind turbines, is a renewable energy source, and does not damage our environment. The environment will not be damaged by the pollution, the natural resources will not be used up, and there won’t be generating of hazardous wastes. Welcoming wind energy today will lay the foundation for a healthy tomorrow that will affect everyone in the United States. There are obstacles and challenges that will make it more difficult, but the environmental impact is well worth it to invest more money into wind energy.