May 21, 2013

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Ice Cold Touch

July 12, 2011 By

    Have you ever touched something like an ice cube or a frozen metal pole in winter? Sure we all have.   It's cold and usually your initial reaction is to pull away quickly. But I bet you didn't know that it is not the ice cube that is cold, it is your finger [...]

Filed Under: Physics, Thermodynamics Tagged With: , , ,

Crescent Moon

July 11, 2011 By

    Just as the Earth circles the Sun so does the Moon circle the Earth.   When the Moon is visible in the night sky it is because the light from the Sun is reflecting off of the Moon and onto the Earth. This creates a sort of glow and makes it so that [...]

Filed Under: Astronomy, Physics Tagged With: , ,

Unicycle Stance

July 8, 2011 By

    How is it that unicycles can stay up with our weight pulling them down?   Unicycles and bicycle stay upright due to a force called Centripetal Force. If you were to leave a unicycle or a bicycle sitting in front of you with no kick stand it would fall over. The reason it [...]

Filed Under: Mechanical, Physics Tagged With: ,

True North

July 6, 2011 By

    When sailors use their compass to find home they use Magnetic North as a point of reference. Magnetic North does not actually point to the North Pole.   The direction that your magnet points is called Magnetic North. The North Pole of the Earth is True North. True North actually varies from Magnetic [...]

Filed Under: Magnetics, Physics Tagged With: ,

Lightning Can Strike Twice

July 3, 2011 By

    The old saying that lightning can never strike twice in the same spot is in fact wrong.   Lightning can strike twice in the same location but the probability of that happening is about the same as winning the lottery.   When clouds build up a charge from an electrical storm they release [...]

Filed Under: Electrical, Physics Tagged With: ,
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