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At what altitude can stars be seen without the twinkling effect that comes from air molecules? And when did humans first see these untwinkling stars? Technically I believe that any amount of air molecules will cause a star to twinkle, thus to not have the twinkling effect you must completely leave earths atmosphere. However there are ways in which you can reduce the twinkling effect, either through discovering locations that have very little atmospheric turbulence, http://www.sdsc.edu/GatherScatter/GSwinter96/deyoung11.html , to using...

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Why is snow a good insulator? Snow is a good insulator due to the crystalline structure of the snow flakes themselves. Snow flakes are very complex in structure, with many hallow areas in the structure in which air gets trapped. Air itself has the ability to get very very cold, while ice (snow flakes) typically can only reach a temperature of 0 celcius. Because the ice only drops to 0, and doesn't get much colder than...

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How do you remove a tracking tool from your computer when anti spyware programs such as Spybot, cannot remove it for you? If your having problems removing a virus or a partiucluar piece of spyware, it may be due to a number of reasons. Typically, however, if your your anit-spyware program finds it, but is unable to remove it, you can fix the problem by booting your computer into safe-mode, and then running your anti-virus/spyware scans in safe mode and removing the programs in this fashion. Safe-mode boots to the...

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Is there a way on WordPad for Windows XP to find out how many pages are in a document you have opened? Yes, but its not easy. Open your document, then you need to check it out in print preview. Click the next page button until you reach the end of your document. The page number will be on the bottom left. To look at your document in print preview mode: click File from the top left. from the drop down dialoge select Print Preview.

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Does it cost money to send and receive e-mails? Because none of the other answers are very good in my opinion. Yes. Sending and reciving email does cost money. Email is no different than any other form of data being transfered. If you call someone up on the telephone, even if its not your phone, it costs someone something somewhere. It is true that there are many free email services, however, these services are only free to the end...

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Do brain cells regenerate? First and foremost, we need to clarify what exactly is being asked. What exactly is being referred to by "brain cells"? There are many types of brain cells, that perform various tasks. Glilia cells, for example, are support cells for the neurons in our brain, and make up a majority of its mass. Glilia cells do in fact regenerate and, because they are technically part of the brain,...

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Are there any web sites that will allow a shareware author to upload his software without charge so that people can download it without charge? What you want is a listing on download.com and fortunately for you, they dont charge for their basic service. Basic Service includes: Directory Listing - Listings on www.download.com so people can search for it Free HTTP File Hosting - They host your file so people can download it. among other things. Click on Listing Packages http://www.upload.com

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Why can't the brain be transplanted? The simple answer is that the connection between the brain and the body is unique to every individual. We cannot replicate or hope to understand all of the connections coming out of the brain into the rest of the body. Longerish: The brain is made up of millions, if not billions, of neurons. Each of these neurons serves some purpose in some aspect of our physical and mental lives. The main...

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Is there a way that I can change the taste of my vaginal fluids? My boyfriend says I taste sour. I would like to put a warning on the suggestion on doucheing frequently. Douching does clean your vagina and will give it a very mild/clean flavor afterwards, however it is not healthy to excessivly douche. Douching removes and/or kills the bacteria that are naturally living in your vagina. These bacteria are healthy and prevent many nasty things such as yeast infection and uti (urinary tract...

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How do maps (like on Google or Mapquest) know exactly where a house is and are able to give driving directions to/from it? I will answer for mapquest, however I would assume that google would use a similar process. How does mapquest know where a house is? Simple answer, they guess. Thats right, they guess. Mapquest has an algorithm called Geocoding which uses the US post office data (for US maps) to guess (quire accurately typically) the latitude and longitude of the address you specify. Geocoding takes the...

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Why do Formula 1 drivers zigzag to warm up right before a race? Formula One cars, and for that matter most race cars, zigzag to "warm up" before a race for exactly that reason; to warm up... their tires that is. Warm rubber becomes stickier and allows the cars to grip the road/track. This allows higher speeds during turns without losing control and the use of more power during acceleration periods without loss of traction.

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Can ultrasonic waves (less than 20 Hz) help repel pests, and are the waves harmful to people? First a clarification of terms (and notation). Ultrasonic, or ultrasound, waves are sound waves that have a frequency of over 20 kHz or (20000 Hz); hence its name "Ultra" ~ to go beyond others, and "sonic" or sound. 20 kHz is the upper bound for the average human ear, and thus waves with a frequency higher than 20kHz cannot be heard by the typical human. Humans, however,...

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How can I fight a distributed denial of service (DDOS) attack? DDOS attacks are difficult to combat. DDOS attacks exploit two weaknesses inherent in the system. The first is the way computers make connections across the internet. The second being the actual data being transfered. Internet content servers are designed to provide a service to a customer base. Typically servers must handle some form of request for service/provision of service with every...

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Is there an effective limit to the length of the cable linking the PS2 and the router? The cable linking your PS2 and your router is most likely of the cat5 or cat5e variety using the ethernet protocol. Typically the maximum length of a cat5 cable is around 100 meters (330 feet) without a sharp degredation of performance(speed). You can use longer cords however you must expect a loss of speed/connectivity. Using cat5e cables will result in longer acceptable segments, however only...

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On my modded Xbox I have an '05' code at the top left hand corner of the screen, and it says to bring it in for customer service. What does that mean? Basically a 05 error code on an xbox means that you are using an unlocked hard drive in your xbox. The hard drives used in the xbox require a password to opperate correctly. Moddifying your xbox with a mod chip allows you to use a unlocked hard drive. The 05 error code says that your xbox is not unlocking the hard drive correctly. This could mean a number of things, including but not...

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Why aren't terrorists tracked down through their emails or websites? The basic answer: Tracking individuals on the internet is a very difficult and time consuming task. If someone wants to stay anonymous on the internet they usually can. The reason why: Basically there are very few things to trace individuals down with. The most common of which are IP addresses, which uniquely define a single connection to the internet at a given time. Responsable Internet...

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