Recent content by kiss89

  1. K

    Understanding Limits: Evaluating lim x->∞ and lim x->-27 for 2 Questions

    what about Q.1 i still don't understand how to solve it using infinity?
  2. K

    Understanding Limits: Evaluating lim x->∞ and lim x->-27 for 2 Questions

    Sorry about that...heres my work http://img88.imageshack.us/img88/9971/img002sy9.png
  3. K

    Understanding Limits: Evaluating lim x->∞ and lim x->-27 for 2 Questions

    I have 2 questions about limits : 1)Evaluate : lim as x approaches infinity for (3x-4-4x^2) / (x^2 -16) 2)Evaluate: lim as x approaches -27 for (27+x) / ( 7/2 + 3 ) thank u.
  4. K

    Question on the slope of the tangent

    Find the points on the graph of y= (1/3)x^3-5x- (4/x) at which the slope of the tangent is horizontal. what i know: - we have to use m=[f(a+h)-f(a)]/h - if we change the equation we can get 3x^4 - 15x^2 -12 - the slope of the tangent is zero. THANX
  5. K

    What Are the Possible Values of r in This Division Equation?

    there is no max. value, and by the way the answer at the back of the book is : 1,2,3,4(for y=5) and 1,2,3,4,5,6(for y=7) and 1,2,3,...,n-1( for y=n). but i still don't understand what these answers mean.
  6. K

    What Are the Possible Values of r in This Division Equation?

    Hi, I'm taking calculus this sem, and i have a question on stuff pre calculus. If x and y are natural numbers and y[less-than]x, then whole numbers q and r must exist such that x=yq+r. a)what is the value of r if y is a factor of x? IT IS ZERO b)If y is not a factor of x, what are the...
  7. K

    Relationship between centripetal force and radius

    ok thanks for your help i think i understood what he wants
  8. K

    Relationship between centripetal force and radius

    i don't know if I'm right , but the computed values i got from Fc/Freq.^2 are the same as the radii , and i got a line where it almost passes through 3 points out of 4 , and the last point is far away from the line , as in the picture attached
  9. K

    Relationship between centripetal force and radius

    i don't know if I'm right , but the computed values i got from Fc/Freq.^2 are the same as the radii , and i got a line where it almost passes through 3 points out of 4 , and the last point is far away from the line , as in the picture attached
  10. K

    Relationship between centripetal force and radius

    does anyone have any idea please, my due date is getting closer
  11. K

    Relationship between centripetal force and radius

    can anybody help me with this pleasez
  12. K

    Relationship between centripetal force and radius

    well in this lab we had to spin a string with mass ( which is constant 20 g) attached to its end above us and this is what it says in the lab: In this part of the experiment, we will calculate the centripetal force and the radius of the circle with frequency as the constant. 1) Adjust the...
  13. K

    Relationship between centripetal force and radius

    hi I'm a new member in this forum and I'm taking physics(University level) grade 12...in one of our labs about the relationship between centripetal force and radius, we must use a constant centripetal force( we used 2N) and find the frequency in RPM for different radii, and this is what we got...
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