Recent content by rogerfreak

  1. R

    Solve 3log25 - log34 + log2(log39): 6.335

    opps...sorry. i had a typo in my post. edited it it should be: \log_2 \log_3 9 \Rightarrow \log_2 \left( \frac{\log 9}{\log 3} \right) \Rightarrow \log_2 2 but i still cannot solve this equation. :(
  2. R

    Solve 3log25 - log34 + log2(log39): 6.335

    This question should be easy to most people here and need some help on this question. 3log25 - log34 + log2(log39) My answer to this question is: = 3log25 - log34 + log2(log9/log3) = log2125 - log34 + log22 = log2125 - log34 + 1 = (log125 / log2) - (log4 / log3) + 1 = 6.703924778...
  3. R

    Why Do Some Hydroxides Form Precipitates in Water?

    why are compounds like copper(II)hydroxide, calcium hydroxide and so on are precipitate solids? I thought they were dissolved in water to form alkali already and they suppose to be in liquid form?
  4. R

    How Do You Calculate the Force Needed to Turn a Pulley System?

    energy conversation? i guess is that hooke's law right? but i am only a high school student and i haven't learn this yet. can u explain and show to me a little more please? this is not my homework. i asked this because i did an artefact which is similar to what i had drawn in the diagram and...
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    How Do You Calculate the Force Needed to Turn a Pulley System?

    hie everybody, this is my first post on this interesting site... :biggrin: i am not sure how do i count the amount of force needed to turn such a pulley from the spindle attached to the dowel through the spindle. the pulleys are fixed to the dowel and are not movable. they just turn as the...
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