Time travel: sci-fi?
When you look at the clear night sky, you see stars-those tiny diamonds suspended in the vast pitch-black emptiness. But stars shine because?? Our own sun, which is a star, emits light. Stars are like giant bulbs but are much more powerful.Light travels at a speed of 3.0*108m/s in vacuum and space is mostly vacuum. In other words light can cover a mighty distance of 300 000 000m in only 1 second!The thing is that 300 000 000m is a just one of those small amounts in space. Other stars are billions of kilometres-let alone metres-away.
Astronomers in fact use light year as the unit for distance. One light year is the distance travelled by light (in vacuum) during one year. Therefore one light year equals (300 000 000*3600*24*365)m.A single light year is definitely huge: 9.46 trillion kilometres-no need to put this in digit form-in fact. But where exactly do I want to converge? A star that you see in the night sky is not one but many light years away. This means that it is very far away.
But most importantly, it means that light from this particular star takes many years-and not mere seconds-to reach your eyes! So what?When you watch a star, you are actually only seeing the light it emitted years ago. At present, the star may be somewhere else in the night sky. (Stars do move in space). It might have deflected a little to the east or north or north-northeast. The star is still emitting light though.
This light will however be seen in the following decades or even centuries; or simply next year.When you watch stars at night, you are actually looking in the past. So who or what is time travelling? The star? You? Or light? The further something is from you, the further in the past you are penetrating into.Maybe then, someday, the newest technologies will be able to observe these seconds after the Big Bang-if it ever occurred in the first place..
The Official Launch of Zapp It Bowling Products
Zapp It Bowling Products has released it's first product to the marketplace.
The development of Zapp It Bowling Ball Cleaner is the first step to providing quality products that actually work.
This product has been tested and approved by the American Bowling Congress.
In their letter of approval to Zapp It Bowling Products, they state that even prolonged application of this product will not harm the surface of a bowling ball.There are many bowling ball cleaners on the market today.
Many of these products only give the appearance of cleaning.
While they appear to be removing black substance from your bowling ball, what you are really seeing is oxidation from the chemicals in the product being exposed to the air.
Some of these cleaners leave microscopic cracks on the surface of the ball not visible to the naked eye. Using these cleaners, the replacement of a bowling ball is necessary much sooner than it should beZapp It Bowling Ball...
Vacuum cleaners > The Official Launch of Zapp It Bowling Products
Bacteria and Household Cleaners
Bacteria are a fact of life. Most are harmless to humans because we have been building up an immunity to them since the day we were born. And no matter the amount of cleaning you do, bacteria can never be completely eradicated from your home, and surprisingly, to some extent they shouldn't be. This is because some are actually beneficial to you.
But, most bacteria you find lurking in your home are not the good kind.
That being said, maintaining a clean and healthy household has plenty of merits, regardless of whether bacteria remains behind. Here are some facts about bacteria and household cleaners that keep them in check.
Choosing Antibacterial Cleaners
Do not bother cluttering your precious storage space with a multitude of antibacterial cleaners. Save yourself some money and choose an environmentally friendly concentrated household cleaner to use in a variety of places. These multi-purpose cleaners contain disinfectants and quaternary...
Vacuum cleaners > Bacteria and Household Cleaners
How To Safely Clean Your Jewelry
To keep your jewelry sparkling you've got to take care of it! Cleaning your jewelry is an important part of its care. No matter how careful you are with your jewelry daily life will take its toll on it ? grime and dirt, hair spray residue, soap film ? they all cause a residue to build up on your jewelry making it dull and unimpressive.Cleaning your jewelry should be done with a little caution. Some stones such as turquoise, pearls, or opals, do not fair well with harsher cleaners. Use only warm soapy water and a Q-tip to gently clean these stones or gems. Rinse and polish.
Toothpaste also works well. Place a small amount on a soft bristle brush, scrub, rinse well, then polish with a soft cloth.Sterling silver jewelry is beautiful. However, overtime it will tarnish and not look so beautiful. It is important to clean your sterling jewelry regularly. There are many silver cleaner dips on the market which can be used for jewelry that has no stones or gems.
However, I don't...
How To Safely Clean Your Jewelry
Vacuum cleaners > How To Safely Clean Your Jewelry
Vacuum casting machine features ultra-fast casting speed and simple maintenance
Vacuum casting machines for the lost-wax casting of metal alloy are today widely used in fields like rapid prototyping, jewellery, protesys and dental application, aircraft engine parts.Following suggestions from real users, Topcast Engineering? TVC vacuum casting machine offers new features for a wide range of metal alloys. Alloys based on gold, silver, brass, bronze, aluminium, tin and other metals can be melt.Melting and casting can be made under vacuum or inert atmosphere.Pressure may be differentiated between the melting chamber and the flask chamber up to 3 bar. Maximum process repeatability is ensured by adoption of ceramic sealing materials.Elimination of materials like cement, plasters, pastes, glues carries to a very simple and fast maintenance.Other features:Ultra fast speed: less than 3 minutes for a complete melting/casting cycle of 2kg gold alloy.Simple and cheap graphite crucible. It can be changed in less than 1 minute.Fully programmable: 100 user programs for setting...
Vacuum casting machine features ultra-fast casting speed and simple maintenance
Vacuum cleaners > Vacuum casting machine features ultra-fast casting speed and simple maintenance
Five Ways to Judge Your Car Stereo Speakers
Car stereo speakers are very vital for an efficient car audio system. Car speakers are unique in that they are designed for reproducing sound frequencies. You can evaluate your car stereo speakers on the following criteria:
- Frequency response of the speakers should be higher and wider for better sound capturing and reproducing
- Efficiency of the speakers determines the distance sound will travel and is measured in terms of decibels, the higher the better.
- For playing your system...
Vacuum cleaners > Five Ways to Judge Your Car Stereo Speakers
A Look at Hawaiian T-Shirts
Hawaiian T-shirts can be found in a wide variety of colors and styles. The popular design can be found in everything from $2 cotton to $100 silk. Some of the more expensive Hawaiian shirts, also considered to be the highest quality, are border Hawaiian shirts.
Border Hawaiian shirts are a luxury because so much fabric is wasted in making them. This well thought-out type of Hawaiian shirt has sleeves, sides, and hems that are identical. Pockets will usually match the shirt pattern...
Vacuum cleaners > A Look at Hawaiian T-Shirts
High Def Forum Reaches 100,000 Post Milestone
COLORADO SPRINGS, CO (ContentDesk via ContentDesk Direct) January 17, 2006 -- High Def Forum (HighDefForum.com) today announced that it has reached the 100,000 post milestone. The High Def Forum founded March 10, 2004, has grown from a lonely 0 members and 0 posts to a thriving 24,000+ active community that has reached the 100,000 post milestone. The High Def Forum has received millions of unique visitors since inception and has helped countless people...
Vacuum cleaners hdtv
Vacuum cleaners > High Def Forum Reaches 100,000 Post Milestone
The Saga of the Annoying Adware
When we think of adware, what comes to mind are those annoying and pesky ads that pop up out of nowhere whenever we are surfing the net. Anybody who has surfed through the net has encountered those irritating pop-up adwares advertising everything from computer software down to Viagra. Adwares are some of the most derided objects in the web alongside viruses, spyware and other malicious softwares and programs. Although adwares are alleged to be the most benign form of spyware, most web users hate...
Vacuum cleaners
Vacuum cleaners > The Saga of the Annoying Adware
New Web Site Provides Safety & Security Products!
(ContentDesk) July 13, 2004 -- Announcing ... SecureAids.com is America's online direct source for all of your personal safety and security products. SecureAids.com offer the best products today to protect you and you're loved one's. We guarantee the most value and variety of secure aid products to meet your needs. Our goal is to keep you safe in today's troubled world.
Our commitment is to provide you quality secure aid products at a fraction of the cost. SecureAids.com currently offers...
hearing aid New Web Site Provides Safety & Security Products!
Vacuum cleaners > New Web Site Provides Safety & Security Products!
Vacuum cleaners
This page loaded in 0.0995 seconds.