Recent content by Selophane

  1. S

    Momentum, 2 blocks and a spring

    Thanks, I got it now, both of those should be Equal :)
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    Momentum, 2 blocks and a spring

    Diagram here ---> http://capaserv.physics.mun.ca/msuphysicslib/Graphics/Gtype16/prob25_En_Mom_conserve.gif A spring of negligible mass is compressed between two masses on a frictionless table with sloping ramps at each end. The masses are released simultaneously. The masses have the same...
  3. S

    Writing Net Ionic Equation for Cu(NH4)2(SO4)2 x 6H2O + NaOH Reaction

    hmm, ok, i think this is correct then? Cu2+ 2NH4+ 2SO42- 6H+ 6OH- + Na+ OH- not sure what ones form the products here tho... thanks for the response!
  4. S

    Writing Net Ionic Equation for Cu(NH4)2(SO4)2 x 6H2O + NaOH Reaction

    I'm trying to figure out how to go about writing the net ionic equation for : Cu(NH_{4})_{2}(SO_{4})_{2} x 6H_{2}O + NaOH incase that doesn't show, Cu(NH4)2(SO4)2 x 6H2O + NaOH... (thats a hydrate there) I believe a precipitate is suppose to form, but i have no clue how to go about this...
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    Collision of block with spring w/ friction

    ah, thanks for the clarification on C, however this is an online assignment and it does say 0.216 J is wrong for A, and well I can't do much if its saying its incorrect, I'll have to let the teacher know I guess, thanks again, much appreciated! -Chris
  6. S

    Collision of block with spring w/ friction

    Thanks for the prompt response! Well glad to see I'm not crazy and kept getting same answer for A, but it's saying it is not correct (this is an online assignment) For C, i assumed the spring didn't matter since it was just as it hit the spring? Perhaps I'm misunderstanding the problem...
  7. S

    Collision of block with spring w/ friction

    A moving 4.20 kg block collides with a horizontal spring whose spring constant is 270 N/m. The block compresses the spring a maximum distance of 4.00 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal surface is 0.250. What is the work done by...
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