Recent content by P-Illiterate

  1. P

    Prove that 5^(2/3) is irrational

    Homework Statement Prove that 5^(2/3) is irrational Homework Equations The Attempt at a Solution I tried writing a proof but that is not getting me any where. This is what I did so far - Show that 52/3 is irrational Proof: Suppose that 52/3 is rational: 52/3 = a/b...
  2. P

    Le Chatelier's principle

    Homework Statement Which process, the formation of the chloro complex, or the formation of the aquo complex, is endothermic? Co(H2O)62+ (aq) + 4Cl- <---> CoCl4 + 6H2O (l) Pink ----------------------------- Blue The Attempt at a Solution The reaction above is endothermic because it turned...
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    Rocket Propulsion - Varying mass

    :blushing: I got the answer! o:)
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    Rocket Propulsion - Varying mass

    Homework Statement A rocket at rest in space, where there is virtually no gravitational force, has a mass of 2.55 * 105 kg, of which 1.81*105 kg is fuel.The engine consumes fuel at the rate of 480 kg/s and the xhaust speed is 3.27 m/s. The engine is fired for 250 s. Find the thrust of the...
  5. P

    Find distance for gravity to do only -4 J of work

    Thank you guys :D I'll be back with another problem soon ... hahahah xD ^-^
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    Find distance for gravity to do only -4 J of work

    the component will be sin?? should it be?
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    Find distance for gravity to do only -4 J of work

    the weight component that acting on the mass
  8. P

    Find distance for gravity to do only -4 J of work

    so the mass is going to the opposite direction of force ...
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    Find distance for gravity to do only -4 J of work

    I know this is wrong because there's no way the answer can be this simple ... W=F.d -4 = mgsin30 * d d = -4/20sin30 d = -.4 .4 to the left is that even righttt?
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    Find distance for gravity to do only -4 J of work

    Homework Statement http://img137.imageshack.us/img137/9280/43448180.jpg [Broken] find distance for gravity to do only -4 J of work Homework Equations [PLAIN]http://buphy.bu.edu/~duffy/PY105/12m.GIF Wg = mgX The Attempt at a Solution Can anyone help me from the first stepp
  11. P

    Spring force, find the speed at equilibrium

    can you give me hints on the other three questions too
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    Spring force, find the speed at equilibrium

    A .50 kg block sliding on horizontal frictionless surface is attached to one end of a horizontal spring (with k = 500 N/M) whose other end is fixed. The block has a kinetic energy of 20J as it pass through its equilibrium position (the point at which the spring force is zero.) what is the speed...
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