Monthly Archives: August 2009

WIND ENERGY PLZ ANSWEr?

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give some advantages and disadvantages

Wind energy can be harnessed and used as a source of power.
Wind energy can clear the local atmosphere of pollution.
Wind energy along with the uneven heating of the earth’s surface creates global wind belts.
Wind energy is a mode of transportation for seed dispersal.

Wind energy can cause great damage in tornadoes and hurricanes.
Wind energy can sink a sailboat.
Wind energy can delay aircraft departures and arrivals.

What are the basics of sailing a large ocean-going vessel by wind power alone?

In a paragraph or two can someone answer the question
describing the basics of sailing a large ocean-going vessel by wind power alone?
I have to answer this question for a project but i have no idea.. Someone HELP!!

The basics of sailing the oceans can be narrowed down to two things: ocean currents and prevailing winds. Civilizations which studied these two phenomena became the explorers and rulers of the seas.

Ocean currents can flow at relatively high speeds — the Gulf Stream has a max speed of 4 knots! Not knowing which way the currents flow could be catastrophic to a voyage. Planning a trip which takes advantage of current will add to the chances of success!

Prevailing winds across the globe mean that there natural paths for sailing ships to take advantage of. Approaching the equator, the winds tend toward the west — these are the trade winds — westward crossings of the Atlantic or Pacific oceans is best done by getting into these trade wind or easterlie zones. North or South of these zones are a band of prevailing winds which blow from the west to the east — the "westerlies". You can see these winds on this representation: (1)

The best of all situations is where the ocean currents and the prevailing winds flow in the same direction. For instance, in the North Atlantic, the Gulf Stream and the westerlies form a "superhighway" from North America to Europe. When modern day tall-ships race across the Atlantic they use the same routes found centuries ago by explorers. (2)

You can see that they use the trade winds to cross from Europe to North America. Then they use the Gulf Stream to go up the East coast, and finally catch the westerlies and the remainder of the Gulf Stream to cross to Europe.

These basics will constrain all wind-powered vessels — especially those "square rigged", ie: driven from winds coming from behind the vessel. Other types of sail craft may be able to sail "into the wind" a little better, but the wind and current will always be their main concern.

science brains at work!?

What are the advantages and disadvantages of wind energy?

How are waves formed? Do you think wave ebergy comes indirectly from the sun? why?

How will knowing when it is high/low tide be useful to human kind?

Why is crude oil found under the seabed or under land which was once covered by the sea?

Why do fires sometimes break out by themselves in landfills containing rubbish?

Dams used for storing water have their limitations. What are they?

The automatic switch found in an electric kettle is considered an energy saving device. How does this automatic switch save energy?

Name some energy-saving devices that are commonly used other than energy-saving light bulbs.

What ia a biogas? What can it be used for?

What is the difference between a tidal power station and a hydroelectric power station?

What are the advantages and disadvantages of niclear power energy?

More questions – my profile. Thank you!

A lot of questions, young lady. You would get a better response if you asked one at a time, though.

Who are the largest companies buying land for wind power?

What companies are currently looking to invest in wind power? Where are they building?

Here is a great link to information on geothermal power. It also offers an additional free stock pick report. Hope this helps…

Would replacing all our fossil-energy sources with solar and wind power be practical?

All have some advantages and disadvantages.

Would it make sense to abandon all our current fossil fuel power sources and replace them with windmills and solar panels? Would we see a major decrease in CO2 levels as a result?

No, it is not possible nor practical.

Reasons:
1. Solar only gives you power during the day, if the sun is out. The more cloud cover you have the less solar production you get.
2. Snow cover on solar panels stops all solar production. Dust and dirt on your solar panels reduces production.
3. Wind energy from windmills/wind farms depends on weather patterns for good production.
4. Wind and solar energy production can not match the load for energy use.
5. At current costs and values, if you do NOT have a subsidy, wind and solar project have a 20 – 30 year simple payback. Life of those projects is often less than 20 – 30 years thus the life cycle cost is a negative, not a positive.

According to NASA, Dr. Hathaway, we could be headed into a new Dalton Minimum. that would mean global cooling not global warming. If you believe in AGW, then you might want to start lobbying for MORE CO2, not less.

EDIT:

Solar Panel Ratings approx 100 W per sq yd

2.5 Million Mega watts = 2.5 x 10^10 sq yd of solar panels

2.5 x 10^10 sq yd = 3,097,600 sq mi

Now you generally rate thee panels at 80% for production. Standard system design offset. So you need to divide that number by 0.8

Solar Panel area = 3,872,000 sq miles

To get a constant generation of 2,500,000 mega watts, you will need to make this area still alrger allowing for weather dust snow etc.

So you have an area approximately 2,000 miles by 2,000 miles. covered 100% by solar collection panels. This does not leave much room in the lower 48 for farms, forests, cities, homes, rivers, lakes…

My source? I design and install these systems.

How much does wind power and solar power cost?

In Australia how much would it cost to have a farm of wind power and solar power. If possible pls tell the cost of each thing individually. Also a sources where the information is found

I know the cost of solar pannel .Each watt cost you only 4 U.S $. No maintenance cost.Life of Solar panel is more than 20 years.

How do we harness wind energy?

List
-Advantages
-Disadvantages

I’m not an expert on wind energy…

Disadvantages: upfront costs are hefty.. and transporting one windmill takes like a train of semis…

Advantages: One windmill can power an enormous amount of area… once it’s built it’s pretty much renewable… and in the long run it outweighs the initial costs many times over. It’s my favorite energy plan… maybe because I know the least about it… but I’ve studied various ideas for biofuels… and they’ve all got biproducts and production costs that are iffy… water not so great… coal obviously not… nuclear, why would we do that to ourselves… fossil fuels obvious… solar, really touchy and super expensive to replace even a broken cell…. I like it… again, it’s the one I know the least about… but it doesn’t seem to be as complicated as the conversion of organic material into fuel… so maybe it’s just that simple.

Time it takes to recoup an investment such as Wind power plant?

Let’s say the wind power plant costs $ 300 million. You will supply electricity to residential homes.
What do you think? How long will it take to recoup that $ 300 million?

You are asking this q at this forum? I am surprised.
Not unless this is idle curiosity. If you are a serious investor you obviously won’t ask it here – but hire some experts to do that job.

Now, do the math. $300 Mill. as fixed cost. Operating cost will at least be $1 Mill a year that includes salary, admin, maintenance, land cost electricity distribution cost etc…

How many homes this windfarm will serve?. That’s the key. Each home on an average consumes 1500 Kwh; at about say, 12 cents a Kwh, that is, $200 per month. ie., $2500 to $3000 per year.
Then, you work backwards: How many homes can YOU serve with your wind farm?. What is the generating capacity.? Higher the capacity, more investment is the result and more running cost.

So, it is difficult to answer until we know how many Kwh can your plant produce for how many homes.

Then, you will know the profit you can make after all the disbursements. If you repay $300Mill over 20 to 25 years with interest, then your profit must be…..xxxxx….dollars. So, you see, it is not that simple to answer.
But wait. Government will kick in quite a bit of money becauise windfarms are environment friendly, no pollution. So, that’s where you go first with hat in your hand.

With all the recalls I thought I would share:?

this is an actual research page I found when working for a home vet and she loved it so much that she put it on her page..read it with an open mind…and think…here is her page also if you are interested..http://www.carinrennings.com

(Don’t read if you have a weak stomach)
What’s Really for Dinner?
The Truth About Commercial Pet Food, by Tina Perry
Cow brains. Sheep guts. Chicken heads. Road kill. Rancid grain. These are a few of the so-called nutritionally balanced ingredients found in the commercial pet food served to companion animals every day.
More than 95 percent of US companion animals derive their nutritional needs from a single source: processed pet food. When people think of pet food, many envision whole chickens, choice cuts of beef, fresh grains, and all the nutrition that a dog or cat may ever need — images that pet food manufacturers promote in their advertisements. What these companies do not reveal is that instead of whole chickens they have substituted chicken heads, feet, and intestines. Those choice cuts of beef are really cow brains, tongues, esophagi, fetal tissue dangerously high in hormones, and possibly diseased and even cancerous meat. Those whole grains have had the starch removed for corn starch powder and the oil extracted for corn oil, or they are hulls and other remnants from the milling process. Grains used that are truly whole have usually been deemed unfit for human consumption because of mold, contaminants, poor quality, or poor handling practices. Pet food is one of the world’s most synthetic edible products, containing virtually no whole ingredients.
Pet food manufacturers have become masters at inducing companion animals to eat things cat and dogs would normally spurn. Pet food scientists have learned that it’s possible to take a mixture of inedible scraps, fortify it with artificial vitamins and minerals, preserve it so that it can sit on the shelf for more than a year, add dyes to make it attractive, and then extrude it into whimsical shapes that appeal to the human consumer. For this, pet food companies can expect to earn $9 billion in sales in 1996.
Scraps and Byproducts For years, many care givers have tried to avoid feeding their companion animals people food leftovers, having been warned by veterinarians about the heath problems they can cause. Yet much scrap material from the human food industry is ending up in dogs and cat’s dinner bowls. What the consumer purchases and what the manufacturer advertises are often two entirely different products, and this difference threatens the animals healthy, especially as they age. Learning to read ingredient labels and taking the time to read them carefully is crucial to making an educated choice when purchasing pet food. Ingredients are listed in descending order of weight (heaviest first) under standards established by the Center for Veterinary Medicine for the Food and Drug Administration (FDA). The name of the product (in most states) is dictated by the regulations of the American Association of Feed Control Officials (AAFCO). The trouble is, AAFCO standards can lead to deceptive product names due to the weight and volume variations between wet and dry ingredients. Also, the average consumer has no idea what the definitions for the listed ingredients mean. Preservatives, vitamins, minerals, flavorings, and cereal make up most of what the companion animal eats.
It is not happenstance that four of the top five major pet food companies in the United States are subsidiaries of major multinational food production companies: Colgate Palmolive (which produces Hills Science Diet), Heinz, Nestle, and Mars )see The Corporate Connection). From a business standpoint, multi-national food companies owning pet food manufacturers is an ideal relationship. The multinationals have captive market in which to dump their waste products, and the pet food manufacturers have a direct source of bulk materials. Both make a profit from selling scraps that originate from places far worse than the dinner table. In his 1986 book Pet Allergies veterinarian Al Plechner sums up what goes into companion animals food: Condemned parts and animals rejected for human consumption are routinely rerouted for commercial pet foods. A similar fate applies to so-called 4-D animals. These are food animals picked up dead, or that are dying, diseased, or disabled, and do not meet human-food qualifications. They are processed straightaway for companion animal consumption. Little goes to waste. Says Plechner, Food processing refuse of all sorts winds up in your animals dinner bowls. Moldy grains. Rancid foods. Meat meal. The latter is ground-up slaughterhouse discards often containing disease-ridden tissue and high levels of hormones and pesticides, the very things that may have contributed to the death of the steer or hog. A decade later, his words still apply. When cattle, swine, chickens, lambs, or other animals meet their ends at a slaughterhouse, the choice cuts — lean muscle tissue and organs prized by humans — are trimmed away from the carcass for human consumption. Whatever remains of the carcass (bones, blood, pus, intestines, ligaments, subcutaneous fat, hooves, horns, beaks, and
any other parts not normally consumed by humans) is, according to the pet food industry, perfectly fit as a protein source for cat and dog food.
The Pet Food Institute, the trade association of pet food manufacturers, acknowledges in its 1994 Fact Sheet the importance of using byproducts in pet foods as additional income for processors and farmers. The purchase and use of these ingredients by the pet food industry not only provides nutritional foods for pets at reasonable costs, but provides an important source of income to American farmers and processors of meat, poultry, and seafood products for human consumption. Many of these remnants are indigestible and provide a questionable source of nutrition. The amount of nutrition provided by meat byproducts, meals, and digests varies from vat to vat of this animal protein soup. A vat filled with chicken feet, beaks, and viscera is going to make available a lower amount of protein than a vat of breast meat. James Morris and Quinton Rogers, professors with Department of Molecular Biosciences at the University of California at Davis Veterinary School of Medicine, assert that there is virtually no information on the bio-availability of nutrients for companion animals in many of the common dietary ingredients used in pet foods. These ingredients are generally byproducts of the meat, poultry and fishing industries, with the potential for wide variation in nutrient composition. Claims of nutritional adequacy of pet foods based on the current AAFCO nutrient allowances (profiles) do not give assurances of nutritional adequacy and will not until ingredients are analyzed and bioavailability values are incorporated. Meat byproducts, the catch-all term of the pet food industry, is a misnomer because these byproducts contain little if any meat. Byproducts contain little if any meat. Byproduct are animal parts leftover after the meat has been stripped from the bone. Chicken byproducts include heads, feet, entrails, lungs, spleens, kidneys, brains, livers, stomachs, noses, blood, and intestines free of their contents. What the pet food manufactures fail to mention is that most byproducts, digests and meals are also filled with other substances, such as cancerous tissue cut from the carcass, plastic foam packaging containing spoiled meat from supermarkets, ear tags, spoiled slaughterhouse meat, road kill, and pieces of downer animals.
Canned Cannibalism Another source of meat that isn’t mentioned on pet food labels is pet byproducts, the bodies of dogs and cats. In 1990 the San Francisco Chronicle reported that euthanized companion animals were found in pet foods. Although pet food company executives and the National Renderers Association vehemently denied the report, the American Veterinary Medical Association and the FDA confirmed the story. The pets serve a viable purpose by providing foodstuff for the animal feed chain, said Lea McGovern, chief of the FDA’s animal feed safety branch. Because of the sheer volume of animals rendered and the similarity in protein content between poultry byproducts and processed dogs and cats, rendering plant workers say it would be impossible for purchasers to know the exact contents of what they buy. In fact, Sacramento Rendering cited by inspectors five times in the past two years for product-labeling violations.
Grease and Grain
The most nutritious dry pet food is no better than the worst if animals will not eat it. Pet food scientists have discovered that spraying the kibble or pellets with a combination of refined animal fat, lard, kitchen grease, and other oils too rancid or deemed inedible for humans makes an otherwise bland or distasteful product palatable. Animal fat is mainly packing house waste or supermarket trimmings from the packaging of meats. Animals love the taste of this sprayed fat, which also acts as a binding agent to which manufacturers may add other flavor enhancers. The pungent odor wafting from an open bag of pet food is created by this concoction. Restaurant grease has become a major component of feed-grade animal fat over the last 15 years. Often held in 50-gallon drums for weeks or months in extreme temperatures, this grease is usually kelp outside with no regard for its safety or further use. The rancid grease is then picked up by fat blenders who mix the animal and vegetable fats together, stabilize them with powerful antioxidants to prevent further spoilage, and then sell the blended products to pet food companies. Rancid, heavily preserved fats are extremely difficult to digest and can lead to a host of animal health problems, including digestive upsets, diarrhea, gas, and bad breath. Once considered filler by the pet food industry, the amount of grain products included in pet food has risen over the last decade as the American population has focused its attention away from consuming beef and toward a healthier diet of grains and vegetables. Commonly two of the top three pet food ingredients are some form of grain products. For instance, Alpo’s Beef Flavored Dinner lists ground yellow corn, soybean meal, and poultry byproduct meal as its top three ingredients. 9 Lives Crunchy Meals lists ground yellow corn, corn gluten meal, and poultry byproduct meal as its top three ingredients. Of the top four ingredients of Purina’s O.N.E. Dog Formula — chicken, ground yellow corn, ground wheat, and corn gluten meal — two are corn-based products from the same source. This is an industry practice known as splitting. When components of the same whole ingredient are listed separately (ground yellow corn and corn gluten meal) it appears that
there is less corn than chicken, even when the whole ingredient may weigh more than the chicken. Soy is another common ingredient in many pet foods. It is used by the manufacturers to boost the claimed protein content and add bulk so that when animals eat a product containing soy they will fell more sated. Tofu is suitable for humans, but most forms of soybean do not agree with a dog or cat’s digestive system. Like many other pet food ingredients, soy is virtually unusable by an animal’s body. Being obligate carnivores, cats have little ability to digest any nutrients from soy. The problem is worse for dogs because they lack the essential amino acid to digest soy products. Soy has also been linked to bloat and gas in many dogs.
Additives and Processing
Pet food industry critics note that many of the ingredients (such as corn syrup and corn gluten meal) used as humectants to prevent oxidation also bind water molecules in such a way that the food actually sticks to the animal’s colon and may cause blockage. Blockage of the colon may cause an increased risk of cancer of the colon or rectum. Two-thirds of the pet food manufactured in the United States contains synthetic preservatives added by the manufacturer. Of the remaining third, 90 percent includes ingredients already stabilized by synthetic preservatives. Because most pet food contains large percentages of added fat, a stabilizer is needed to maintain the quality of the food. Sodium nitrite, often used as a coloring agent, fixative, and preservative, has the ability to combine with natural stomach and food chemicals (secondary amends) to create nitrosamines, powerful cancer-causing agents, according to A Consumer’s Dictionary of Food Additives.
Many pet foods advertised as preservative-free do not contain preservatives. Almost all rendered meats have synthetic preservatives added as stabilizer, but manufacturers aren’t required to list preservatives they themselves haven’t added. Premixed vitamin additives can also contain preservatives. In the 1003 Journal of the American Veterinary Medical Association, veterinarian Philip Roudebush reported finding low concentrations of synthetic antioxidant preservatives in all analyzed samples of products labeled as chemical free or all-natural. Other types of additives depend on whether the pet food is semi-moist, dry or canned. Because semi-moist food contains 25-50 percent water, antimicrobial preservatives must be used. Propylene glycol was frequently used in cat food until it was pulled in 1992 for causing a variety of health problems. Processing greatly alters the nutritional value of the food ingredients. Veterinarian R. L. Wysong states in Rationale for Animal Nutrition: Processing is the wild card in nutritional value that is, by and large, simply ignored. Heating, freezing, dehydrating, canning, extruding, pelleting, baking and so forth, are so commonplace that they are simply thought of as synonymous with food itself. Because the ingredients that pet food companies use are not wholesome, and harsh manufacturing practices destroy what little nutritional value the food may have had in the first place, the final product must be fortified with vitamins and minerals.
Questionable Nutrition
How, then, can any pet food be guaranteed to be 100 percent complete or nutritionally adequate? As long as it meets the AAFCO minimum standards, such a guarantee can be on the label. Yet in 1994, feed tests conducted by the New York State Agriculture Department showed 7 percent of all pet foods analyzed failed chemical analyses for guaranteed nutrients. Other states report similar findings, with failure of analyzed feed ranging from to 12 percent. Even if a pet food meets AAFCO standards, certain nutritional requirements (for example, lysine) can vary between species by as much as seven-fold. Although manufacturers clam that millions of companion animals can thrive on a diet consisting of nothing by commercial pet food, research and an increasing number of veterinarians implicate processed pet food as a source of disease or as an exacerbating agent for a number of degenerative diseases. For example, kidney disease is on of the top three killers of companion animals. According to Plechner, the extra protein and harsh ingredients of many pet foods place an overload on the kidneys. Left untreated, the toxic buildup leads to vomiting, loss of appetite, uremic poisoning, and death. Wysong adds, In the last few years, large statistical studies have shown the link between the diet (of processed foods) and a variety of degenerative diseases, including cancer, heart disease, allergies, arthritis, obesity, dental disease, etc. After extensive research, the Animal Protection Institute (API) published a Pet Food Investigative Report to educate companion animal care givers about pet food ingredients, ingredient definitions, labeling, and dietary ailments resulting from processed commercial pet food, including the most commonly know brands. Yet, whether such food is purchased at the supermarket, pet store, or from a veterinarian, it makes little difference in terms of the quality — only in the cost. Since the report was published earlier this year, API has conducted more research on holistic pet care and pet food alternatives, but still claims that the vast majority of pet foods available on the market today provide less that optimum nutrition for companion animals.
It is sad to think that the food provided by animal care givers to their four-legged friends could be hazardous to the animals’; health and longevity. Care givers should assume responsibility for providing as healthful a diet as possible for the animals in the care. Consumers should be informed: speak with a holistic practitioner or herbalist, or consult your veterinarian (but be aware that a veterinarian’s knowledge of nutrition may be limited to the two weeks of nutrition he or she had veterinary school 20 years ago). Although the ideal solution would be for companion animals to be fed only wholesome homemade and/or vegetarian diets, this is not an optician for everyone — the cost and time commitment is sometimes prohibitive. By taking more moderate steps, however, care givers can still greatly improve companion animals’ diet and quality of life.
EDIT: On Carin Rennings page she lists recommended diets… she really researched them and its really helpful….go check it out..smile
EDIT EDIT: sorry but it is still happening to the person that said its not… when I did my research I asked around and found out that the people that picked up the dead pets from the vets offices that did not want a private creamation actually had a company come in and pick the bodies up…really sick…valley protien I think was the name of the company…
I am not just trying to "SCARE" people …here is more proof….read this article JUST WRITTEN!! and see for yourself whats in your pet foods!!

http://www.petfoodreport.com/aboutpetfood.htm#ingredients

Edit: as far as ill timing and such… I think its just the right time!! people need to open their eyes…so sorry you 2 feel that way…smile

http://www.api4animals.org/facts.php?p=359&more=1

Thanks for the research and letting others see it. Those who are new pet owners should know about it, if they don’t already.

what are some advantages and disadvantages of renewable and non-renewable energy sources.?

the following sources:
RENEWABLE- wind, solar, and hydropower
NON_RENEWABLE- propane, coal and uranium ore.

Wind –
pros – clean, renewable
cons – not very efficient, location dependant, expensive to maintain, requires a lot of land, reliability

Solar
pros-clean, renewable
cons- clouds, large area required, location, currently not very efficient

Hydro
Pros – efficient, clean, renewable, reliable
Cons – location, environmental impact of dam

Propane
Pros – relatively clean
Cons – expensive, not as efficient as other fuels, must be near a source

Coal
Pros – cheap, cost efficient, reliable
Cons – dirty

Nuclear
Pros- no air pollution, efficient, reliable
Cons – disposal of used uranium, security, expensive, although quite safe, an accident can have severe effects.