Recent content by bearbratz

  1. B

    Maximum Centripetal Acceleration

    You are designing a centrifuge to spin at a rate of 13,810 rev/min. (a) Calculate the maximum centripetal acceleration that a test-tube sample held in the centrifuge arm 14.1 cm from the rotation axis must withstand. 249167 m/s2. (b) It takes 1 min, 16 s for the centrifuge to spin up to its...
  2. B

    Magnitude and angle counterclockwise from the + x direction

    Thank you very much that worked.
  3. B

    Magnitude and angle counterclockwise from the + x direction

    Homework Statement Express your answer in part (a) in terms of magnitude and angle counterclockwise from the + x direction. Vector = -25.3i-1.2j Homework Equations arctan(ady/adx) The Attempt at a Solution Arctan(-1.2/25.3)=2.72 This is wrong... but I have no idea how to fix it.