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Question #: 664

Question: WHY IS THE SKY BLUE?

Current Solution

Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

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Other Possible Solutions to this Question

  • WHAT CAUSES THE SKY TO BE BLUE?

    Sunlight reaches Earth's atmosphere and is scattered in all directions by all the gases and particles in the air. Blue light is scattered in all directions by the tiny molecules of air in Earth's atmosphere. Blue is scattered more than other colors because it travels as shorter, smaller waves. This is why we see a blue sky most of the time.

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    WHAT CAUSES THE SKY TO BE BLUE?

  • WHY SHOULD I BUY THE SPINDLE?

    The spindle is quieter and has more consistent torque (It doesn't get "bogged down" when it starts cutting into material). It can be used with collets of varying sizes (not restricted to imperial sizes). It is water cooled and so it does not blow air downward to cool the spindle like the router does. The spindle is also machined with much higher precision than typical routers and will have a much longer life.

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    WHY SHOULD I BUY THE SPINDLE?

  • IS THE FLU SERIOUS?

    Influenza is the most frequent cause of death from a vaccine-preventable disease in the United States. From 1990 through 1999, an average of approximately 36,000 influenza-associated pulmonary and circulatory deaths occurred during each influenza season. In addition to fatalities, seasonal influenza is also responsible for more than 200,000 hospitalizations per year. Rates of infection from seasonal influenza are highest among children, but the risks for complications, hospitalizations, and deaths are higher among adults ages 65 and older, children younger than 5 years, and people of any age who have medical conditions that place them at increased risk for complications from influenza.

    A novel H1N1 virus was first detected in March of 2009 and quickly spread to pandemic levels. In the U.S., it is estimated that approximately 43-89 million persons became ill with 2009 pandemic H1N1 from April 2009 to April 2010. The virus also resulted in significant hospitalizations and deaths among children, adults 19-65 years, obese persons, and pregnant and post-partum women.

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    IS THE FLU SERIOUS?

  • WHO IS THE BRAIN

    The ALL POWERFULL!!!

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    WHO IS THE BRAIN

  • THE LONGEST RIVER IN WORLD IS

    Amazon and the Nile are the longest rivers in the world.

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    THE LONGEST RIVER IN WORLD IS

  • THE LONGEST HIGHWAY IN WORLD IS

    Trans-Canada

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    THE LONGEST HIGHWAY IN WORLD IS

  • THE HIGHEST MOUNTAIN IN WORLD IS

    Mount Everest

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    THE HIGHEST MOUNTAIN IN WORLD IS

  • WHAT IS THE LEAD TIME FOR REDFROG?

    You can expect a two week lead time for the redFrog pick and place machine.

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    WHAT IS THE LEAD TIME FOR REDFROG?

  • WHAT IS THE LEAD TIME FOR BLACKTOE?

    You can expect a one week lead time for our machines.

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    WHAT IS THE LEAD TIME FOR BLACKTOE?

  • WHAT IS THE LEAD TIME FOR BLACKFOOT

    You can expect a one week lead time for our machines.

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    WHAT IS THE LEAD TIME FOR BLACKFOOT

  • WHAT IS THE PICK AND PLACE LEAD TIME?

    You can expect a two week lead time for the redFrog pick and place machine.

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    WHAT IS THE PICK AND PLACE LEAD TIME?

  • IS DRILL BIT USED IN THE CNC MACHINE?

    The cutting tool is an end mill (it looks like a drill bit). It is a cutting tool that can plunge and cut sideways. That item is not included and is a consumable. You will purchase these very frequently and will have geometry that is very specific to how you apply the cnc machine.

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    IS DRILL BIT USED IN THE CNC MACHINE?

  • WHAT IS THE WARRANTY ON YOUR PRODUCTS

    We provide a one year warranty from the date the item is delivered.

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    WHAT IS THE WARRANTY ON YOUR PRODUCTS

  • WHAT IS THE WARRANTY ON COMPLETE UNIT?

    We provide a one year warranty from the date the item is delivered.

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    WHAT IS THE WARRANTY ON COMPLETE UNIT?

  • WHAT IS THE SHIPPING FEE TO MY COUNTRY?

    You can determine if the country is serviceable by:
    - selecting the items you want to purchase on the website
    - go to the cart (shopping cart top left of any webpage)
    - log in, or register
    - Enter the address and click on calculate shipping.

    The webpage will return the direct rates and whether your area is serviced or not. Feel free to enter any address as long as you are able to receive the package from that address.

    The shipping times are determined by the service you select in the shopping cart. If a machine is purchased, we generally have a one week lead time unless otherwise stated in the description of the machine's product page.

    Additional Information:

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    WHAT IS THE SHIPPING FEE TO MY COUNTRY?

  • WHAT IS THE SHIPPING COST TO MY COUNTRY?

    You can determine if the country is serviceable by:
    - selecting the items you want to purchase on the website
    - go to the cart (shopping cart top left of any webpage)
    - log in, or register
    - Enter the address and click on calculate shipping.

    The webpage will return the direct rates and whether your area is serviced or not. Feel free to enter any address as long as you are able to receive the package from that address.

    The shipping times are determined by the service you select in the shopping cart. If a machine is purchased, we generally have a one week lead time unless otherwise stated in the description of the machine's product page.

    Additional Information:

    Click the link to add information to this solution:
    WHAT IS THE SHIPPING COST TO MY COUNTRY?

  • HOW DIFFICULT IS IT TO BUILD THE BLACKTOOTH

    The blackTooth Laser cutter and Engraver can be built in a weekend. Take a look at the build instructions and try to determine if you feel you have sufficient capability to put together the laser system.

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    HOW DIFFICULT IS IT TO BUILD THE BLACKTOOTH

  • HOW THE ROUTER IS CONNECTED TO ELECTRONICS?

    The parallel breakout board has a relay that can turn the router on and off according to the control software in the computer. The router will turn on automatically prior to the machine moving (a time frame can be set so the router is up to speed). When the machine is finished and is not moving, the router automatically turns off. This is with the m3, m4, and m5 codes in the g-code.

    If you are interested in the USB breakout board, you will need to get an independent relay board.

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    HOW THE ROUTER IS CONNECTED TO ELECTRONICS?

  • HOW IS THE ROUTER CONNECTED TO ELECTRONICS?

    The parallel breakout board has a relay that can turn the router on and off according to the control software in the computer. The router will turn on automatically prior to the machine moving (a time frame can be set so the router is up to speed). When the machine is finished and is not moving, the router automatically turns off. This is with the m3, m4, and m5 codes in the g-code.

    If you are interested in the USB breakout board, you will need to get an independent relay board.

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    HOW IS THE ROUTER CONNECTED TO ELECTRONICS?

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