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    Energy in vibrations?

    Hi people can anyone help me? I need to know how much energy it takes to vibrate a mass at a frequency and speed. How much energy is there in a mass of ex. 100Kg at 10Hz and a speed of 10mm/s ??? Tangs!
  2. G

    Static build up and magnetism!

    What is the difference between static attraction or repelling, compared to magnetic. I understand the princips of static build up and why a charged positive and charged negative attract each other. I also understand how the atoms are arranged in a "metal-magnet". But why cant you attract a...
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