Recent content by Mivz18

  1. M

    Problem help!

    Problem: The distribution coefficient, k = (conc. in ligroin/ conc. in water), between ligroin and water for solute A is 7.5 . What weight of A would be removed from a solution of 10g of A in 100mL of water by a single extraction with 100 mL of ligroin? What weight of A would be removed by...
  2. M

    Vector addition

    I'm having trouble with this one problem: A plane flies from base camp to lake A, 280 km away, in a direction of 20.0 degrees north of east. After dropping off supplies it flies to lake B, which is 190 km at 30.0 degrees west of north from lake A. Graphically determine the distance and...
  3. M

    Simple calculation problems?

    Problem: The consumption of natural gas by a company satisfies the empirical equation V=1.50t + 0.800 00(t squared), where V is the volume in millions of cubic feet and t the time in months. Express this equation in units of cubic feet and seconds. Assign proper units to the coefficients...
  4. M

    Block on Spring without Friction

    Nevermind, lol, I once again found my error. I realized that part A can be used in the determination of part B. Therefore, the Initial kinetic energy would contain the velocity I'm looking for while the Final Kinetic energy would contain the final velocity of 1.08. Therefore, the k constant...
  5. M

    Block on Spring without Friction

    I'm having a bit of trouble with the second part of this problem: A spring is stretched a distance of Dx = 40 cm beyond its relaxed length. Attached to the end of the spring is an block of mass m = 12 kg, which rests on a horizontal frictionless surface. A force of magnitude 35 N is required...
  6. M

    Friction Fraction

    Nevermind, I figured out where to go and how a1 and a2 were defined to cancel out the D variable and bring in the coefficient of friction variable.
  7. M

    Friction Fraction

    Well, this is a problem I've put aside a while, but still haven't been able to figure out. So far, I have discovered that Vo = Vo for both blocks on ramp 1 and 2. D1 = D and D2 = 0.625D . Solving for A), Ramp 1 Vf ^ 2 = Vi ^2 + 2a(delta D) 0 = Vi ^2 + 2a(delta D) 0 = Vi^2 + 2aD...
  8. M

    Velocity Addition

    Nevermind, I found my mistake. I was supposed to divide the second quantity by the first, not multiply, an error by the help. Thanks for your help though Physics_wiz!
  9. M

    Velocity Addition

    https://tycho-s.physics.wisc.edu/cgi/courses/shell/phys170/fall04/ie.pl?08/velocity [Broken] This is the link to the online problem I'm doing. Try the help and you'll see what I'm talking about. Maybe that may help you help me, lol.
  10. M

    Velocity Addition

    No, it can't because in theory, nothing is faster than the speed of light. Therefore, if we consider the vector addition of regular (slower) speeds as learned in beginning physics, you will run into a problem which I was shown in the help. As you increase the speed of the sandwich to 0.5c and...
  11. M

    Velocity Addition

    I'm trying to figure this problem out, and think it's not that hard, but am having trouble acquiring the answer. Here is the problem: You and a friend decide to "hitch" a ride in the mailcar of a train heading to Green Bay (due north). Halfway there, your friend asks you for a sandwich out...
  12. M

    Friction Fraction

    Here is the problem: A student has two ramps both are at an angle of 30o. Ramp 1 is frictionless and ramp 2 has friction. The student also has two blocks, one for each ramp. She pushes the blocks up the ramps with the same initial velocity. The block on ramp 2 only travels a fraction f =...
  13. M

    Recoiling Canon

    nevermind, I found my miscalculation....DUH!
  14. M

    Decelerating Car

    I'm in a bind. I figured out the Fnet for each direction: Fnet of x = 0 = N - mg of y = mg - mgcosx Fnet of y = 0 = Fs - mg of x = (mu)mg - mgsinx Then, when I try to solve for theta (x), I get mg(1 - cosx) = mg( (mu) - sinx) Simplified, 1-cosx = (mu) - sinx or 0.626 = cosx -...
  15. M

    Recoiling Canon

    I still get the same answer; whether my answer is positive, or negative, it is still wrong. Also, my signs weren't mixed I don't believe, because when I solve for Vc with the way you set it up, I get the same answer. I'm so lost in physic's space!!
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