Sport Water

How does newton's 3 laws affect the sport water polo?

I have a project and i have to show how newton's 3 laws affect water polo. I know what the three laws are, the problem i'm having is trying to get them with water polo, a sport i've only read about.

1. Every object in a state of uniform motion tends to remain in that state of motion unless an external force is applied to it.

The ball will float on a point in the water unless an external forve is acted on it. i.e. a wave in the water hits it or a player picks it up.

2. The relationship between an object's mass m, its acceleration a, and the applied force F is F = ma

The mass of the ball never changes but if the player throws it with a greater acceleration it will exert more force. It will travel faster and be harder to stop.

3. For every action there is an equal and opposite reaction

The ability of the player to float is based on this. The wight of the player will be equal to the reaction of the water pushing them upwards.

Hope this helps you get a few ideas. Good luck with the project.

Vitamin Water

Vitamin water is another way for you to get the nutrients and vitamins you need, without having to remember to take a vitamin pill every day. Many types of vitamin waters are created to give you a balance, as a sport drink would as well. Vitamin water includes the use of water, which your body needs to stay hydrated and to 'work' properly, but it is also going to include the liquid vitamins that will give your body the replenishment it needs to continue on with the sport or activity that you are working at.

To give you a better look at what is in some of the vitamin water drinks you may have seen we are going to list the most popular ingredients found in vitamin water. This includes protein, carbohydrates, fat, niacin which is also known as b3, pantothenic acid, which is also known as b5, vitamin b6, folic acid, and biotin, as well as vitamin b12.

While you are not seeing vitamin A, C, and more, you can read the back of the vitamin water label you are going to purchase to see exactly what is in the drink of your choice. When you do not see a particular vitamin on a label, you are not going to be getting that vitamin in your drink. Look for a complete listing of vitamins and what you want in your drink to be sure you get all the nutrients and vitamins in your daily routine.

Vitamin water sometimes is not all it is advertised to be, if you are looking at a fake. Some water bottles are going to sound like they are vitamin water, but they are not really. What is important and so you can tell the difference is that you read the labels. While a water may say sports water, it doesn't mean there is actually anything added to the water to make it a sports drink that is valuable for your body overall. You want to read the labels, and find out exactly what is added to the water so you know for sure what you are paying money for. After all, if they're really is not any vitamins added to the vitamin water you are seeing on the web page or at the local retailers, you might as well be drinking the water from you tap and get the same refreshing results.

About the Author

Roger Thompson writes Health Related Articles and Jobs for
The Number one healthcare Job site
He also advises consumers on online products.

Sport Water

Light Sport Water

i have a 92 buick regal grand sport. the care was leaking radiator fluid and water but not from the radiator ?

now the steering locked up and all the gauge lights are on. another thing is the belts arent working and its throwing something up from the belts when the belts where turning. now the battery light says there is no juice, and there car is dead. what is the problem, is the car a piece of grap now ??? please help!

You need a new water pump and new belts. The water pump threw coolant on the belts and they are slipping on the pulleys.
Not a piece of grap, just needs a new water pump and belts.

Sunglasses and Ultraviolet Light – a Guide to Choosing Your Sunglasses

 

 

There are many different types of tint available today for your sunglasses, and choosing the correct tint can be rather confusing. This article guides you through the different colours and types of tint, allowing you to make an informed choice about the most suitable tint for your own personal needs. We also examine the characteristics of ultraviolet light and why protection is important.

Light travels as electromagnetic waves, similar to the waves on the sea, with peaks and troughs. We specify the different colours of light by the wavelength of radiation they emit. (The wavelength is the distance between two adjacent peaks or troughs of that wave). As light has a very small wavelength, these measurements are extremely small and are measured in units called “nanometres†(nm), where a nanometre is one billionth of a metre!

Think of the colours of a rainbow, with red on the outer part of the curve and blue/violet on the inside. Red has a wavelength of 710nm, green is 500nm, and blue/violet is 400nm. So the wavelength is getting smaller as we pass from the red end of the visible spectrum through to the blue end. Ultra-violet lies beyond the blue/violet band, between wavelengths 400nm to 100nm, but the human eye cannot usually see light with a wavelength smaller than 400nm, making ultra-violet light invisible to us – so we call it ultraviolet radiation.

Although UV radiation is invisible to humans, many animals and insects can detect UV light, which they use in helping to find prey, etc. For example, kestrels can detect the UV light given off by the urine trails that field voles make as they move around, so from high up in the sky, when these birds of prey find many criss-crossing urine trails on the ground, this indicates a good place to hunt for the voles.

One possible reason why we cannot detect UV light is that if the crystalline lens in the human eye has evolved to only focus on a limited range of colours, this helps to give us a sharper image of what we see, whereas if we could focus over a larger range of wavelengths this could lead to chromatic aberration, a distortion of vision that would reduce image clarity.

Ultra-violet radiation can be divided into three main bands or groups, depending on wavelength :-

1. UVC radiation -100 to 290nm

UVC rays are absorbed by the all-important ozone layer that surrounds the Earth as part of the outer atmosphere, thus preventing this radiation from reaching the ground.

2. UVB radiation - 290 to 320nm

UVB radiation is the most dangerous, as this is what can damage the eyes and cause sunburn to the skin. UVB is the cause of snow-blindness, where the radiation induces a photochemical reaction in the cornea and overlying conjunctiva after a few hours exposure, producing swelling of the cornea (oedema) and inflammation of the surrounding tissue. The swollen, oedematous cornea becomes cloudy – hence the blurred vision, and also very painful. There is photophobia (dislike of any exposure to light) and spasm of the eyelids. It usually lasts for a couple of days, and is only alleviated by using local anaesthetic drops, amethocaine 1%, to reduce the pain, and adrenalin drops 0.01% to relieve the congestion.

UVB radiation does not pass through glass, so a simple glass lens would prevent it from reaching the eye. Polycarbonate, a type of plastic sometimes used for spectacle and sunglass lenses, also cuts it out completely.

Some believe that regular exposure to UVB radiation can, over a period of time, contribute to cataract formation at an earlier age than normal, and may also cause the development of pterygia, which are growths of tissue that encroach over the cornea from the sides.

UVB radiation varies with the time of day, being most intense between 10am and 2pm, when the sun is at its brightest. It is stronger at high altitudes, and more intense near the equator, due to the more direct nature of the sun’s rays in this region.

3. UVA radiation - 320 to 400nm

In contrast to UVB, which varies in intensity with the time of day, UVA radiation is more constant with less variation. Also it is not blocked by glass, and so can still pass through to reach the eye. However, the crystalline lens of the human eye absorbs most of the UVA radiation, so hardly any UVA is allowed to pass through to the back of the eye. There is no known evidence that UVA causes harm to the eye, although scientific opinion is still divided and under debate.

UVA radiation was originally thought to have only a minor effect on the skin, but recent studies have shown that whilst UVB causes damage to the surface layers of the skin as sunburn, the UVA penetrates into the deeper layers of the skin, causing damage further down.

Reflected Light

UV radiation not only reaches us directly from the sun, but a considerable portion is reflected from various surfaces around us, to reach our eyes and skin indirectly. Fresh new snow can reflect the most, with up to 80% reflected UV rays. On holiday on the beach, sand can reflect 15% UV light, along with concrete buildings and walls etc. A foaming, frothy sea reflects 25%, whereas still water and normal ground reflects around 10% UV radiation.

Children and UV Light

As UV damage tends to build up over many years of exposure, such as going on holiday to warm bright climates or playing outside on a sunny day, children and young adults are at particular risk, and you should always consider some sort of eyewear protection for them even though they seem to cope with bright light better than us adults (when playing at the seaside, for example).

Wearing a peaked cap is not really enough protection, as a lot of the UV radiation is reflected off the ground (see earlier “reflected lightâ€) and straight into the eyes, especially on a sandy beach. Make sure the sunglasses have a full UV protection.

Choosing the Best Tint for Your Sunglasses

Ideally, you should go for a tint that absorbs at least 98% of both UVA and UVB radiation. If you see a label “UV400â€, this means that all radiation up to 400nm (thus all UV radiation) is absorbed or blocked by the lens.

Dark grey, grey/green, or brown are the three main colours to choose from, and is a personal preference. I, myself, prefer grey or grey/green, because it seems to keep the colours true to life, but many people like brown because it can enhance the contrast and so help to make things appear sharper. Amber coloured tints are used to block out blue light, which again enhances contrast, so making the image sharper. Amber tints can therefore be used for skiing, sailing, flying, target shooting etc.

Lenses made from polycarbonate absorb most UV radiation, and wrap around designs are good for preventing light from entering the eye from the sides.

Different coloured tints are available to enhance vision and improve visual comfort for many activities. Sunglasses are very important as they reduce glare and protect against harmful ultraviolet radiation.

The main tints available can broadly be divided into neutral grey, polarising, yellow-brown, green, red and photochromic.

1. Neutral Grey

This filters out all wavelengths of light by an equal amount, and so colours appear more natural looking than with tints of other colours. Grey tints are good for activities where subtle colour differences are important, such as golf, mountaineering and skiing.

2. Polarised tints

Polarised tints are good for reducing glare from reflected light bouncing off surfaces such as water or wet roads, making them a good choice for fishing, water-sports, driving or cycling (on wet surfaces). However, polarised lenses might also reduce important details in skiing or golf.

3. Yellow/Amber tints

Yellow or amber tints help to increase contrast by blocking out the blue end of the visible spectrum, resulting in a reduction of blue light scatter. They enhance differences in contour and make things appear brighter in low light levels. This makes yellow or amber tints good for shooting, snow sports, driving or cycling.

4. Green tints

Green tints help to enhance the background, which makes them a particularly good choice for golf, tennis and some forms of shooting, where the object needs to show up against the background.

5. Red tints

Red tints enhance objects at the red end of the spectrum, and can be used in clay-pigeon shooting where the target is orange, in skiing to give contrast to the changes in reflected light, or in motor sports to reduce the reflected glare from the road.

6. Mirror tints

Mirror tints limit glare, increase absorption and reduce infra-red, thus reducing the build-up of heat. Mirror tints are good for snow sports, water sports, cycling and running.

7. Anti-reflection coatings

Anti-reflective coatings minimise lens reflections, especially from the back surface, and are recommended for racket sports, fishing, shooting and archery.

8. Photochromic tints

In photochromic tints the darkness of the tint changes according to the light levels, most commonly between around 20% to 80% transmission. Generally, two photochromic colours are available, brown or grey. Photochromic lenses are good for sports played in variable light levels, such as golf or tennis.

The following list gives a summary of suggested tints for different sports and activities:-

• Cycling - polarising, yellow/amber

• Golf - green, neutral grey, yellow/amber, brown

• Shooting – reddish-brown, orange, yellow to brown, green

• Skiing – brown, red/orange, neutral grey

• Tennis – green

• Fishing – polarised

• Motor sports – polarising, yellow, red

• Water sports - polarising brown or grey

• Running - green, neutral grey

• Football, and fast moving ball sports - amber

I hope this guide has been of some use to you, but please remember that it is only a guide, so feel free to take it “lightly†(excuse the pun – I couldn’t resist) as the colour of tint you choose for your sunglasses is very personal, so if you prefer a certain colour of tint that falls outside of these guidelines - don’t worry. As long as it blocks out all the ultraviolet light (UV 400) then that’s all that matters. Enjoy your sunglasses!

About the Author

Stephen Jenkins is a UK optometrist who qualified in 1990 and has his own practice (Watson and Jenkins Opticians) in Chesterfield, Derbyshire. The practice also sells designer sunglasses online and is an official supplier for Oakley, Rayban, Gucci and many more. Advice on ultraviolet light and how to choose the correct tint for your sunglasses. Regular news updates from the eyecare world, such as the latest advances in gene therapy for treating blindness. Free fast UK delivery and low cost worldwide shipping. Visit http://opticalreflections.co.uk/

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Promotional Water Bottles - The Affordable Marketing Tools for Your Sporting Business

If you have a sporting business and you want to promote it to gain more clients but don’t have the money for an advertising campaign, then making use of promotional items is the best way for you. There are a number of these items available on the market, which includes pewter items, notepads, pens, t-shirts, mugs, umbrellas, and water bottles. However, if your business is catered more to sports, then promotional water bottles work great for you. These water bottles are great for creating publicity for your business, considering that water is one of the necessities during any fitness activity.

An Affordable Way to Promote Your Business

Promotional water bottles are very popular marketing tools nowadays not just for sporting companies but also for other types of businesses because of its affordability. Even if they could be used everyday, they could still come in very reasonable prices if you just know where to look. If you have an expansive budget, then you could go for the more costly water bottles. But, if you are on a tight budget, then you could go for the polycarbonate water bottles or those that are made of aluminum or plastic. With these bottles, your marketing strategy will go a long way.

Giving You the Visibility You Need

These promotional water bottles are also great promotional items that will lend more visibility to your brand or your logo. This is because they are used by people every day and could be carried just about anywhere, making them effective walking advertisements. You can see them inside cars, on office tables, in the water holders of bicycles, and almost anywhere where people need a drink. So if you are giving out these water bottles as promotional items, it is best if you have them imprinted with your logo or company name as well as your slogan. In this way, your name and logo will be seen by a lot of people, not only by those using your water bottles.

Deciding to use promotional water bottles is not enough to promote your business, but you would also need to choose the best size for them. You have to keep in mind that it is very important for you to choose the best kind of water bottle for your campaign. This is because if you will make use of water bottles that have more useful features like a carabiner, then the recipients will appreciate it more.

About the Author

Douglas Gregory is an advertising and marketing expert. He is widely knowledgeable about promotional products, corporate gifts, and the like for which people have the need or want to possess. There are so many products that fill the gap between "wanting" and "needing," and people should be aware of the many choices they have when it comes to merchandising items. Finding the right product for the right interest is the key to the world of merchandising, and his articles help shed some much-needed light on what products work for what people.

Chavez-Duddy: A Fighting Heart Isn’t Enough
By Thomas Hauser: John Duddy sat in the “green room” at The Alamodome in San Antonio on the evening of June 26th. Before the night was done, eight thousand fans would watch him do battle. Hundreds of thousands more would see him on television. Few people have an audience of that magnitude at any time in their life.

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