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    First Order ODE problem (ipod battery)

    Let t=100-t^2? I tried doing this but I couldn't make sense of it... how would I integrate it? Also, thanks so much for posting your help.
  2. H

    Question about conservation of momentum

    Hi everyone, If you have a sphere of 10kg, traveling at an initial velocity v. And this sphere collides with two other spheres, each of 5kg. One shoots off at an angle of 60 degrees from the normal, and one at 45 degrees from the normal. There sphere that fires off at 60 degrees now travels at...