Ask Experts Questions for FREE Help !
Ask

Search:

Type: Posts; User: CWH68

Search: Search took 0.00 seconds.

  1. Question: Moment of inertia

    by CWH68
    Answers
    2
    Views
    633

    Think Conservation of angular momentum. Compute...

    Think Conservation of angular momentum. Compute the moment of inertia of the system before and after the student walked toward the center.
  2. Question: Linear Equilation

    by CWH68
    Answers
    2
    Views
    1,123

    Draw the Cartesian plane and paint every point (...

    Draw the Cartesian plane and paint every point ( x, y) for which 2x + 3y = 0, say, blue.
  3. Answers
    4
    Views
    913

    There is a unique 4th degree polynomial P such...

    There is a unique 4th degree polynomial P such that P(1) = 1, P(2) = 5, and P(n) would be the nth term of the sequence. Maybe that's it.
  4. Answers
    1
    Views
    1,240

    I finally found the answer to this question after...

    I finally found the answer to this question after some extensive research. The song came out in 1984. The artist is:
    Emile den Tex, and they are from the Netherlands.
    I guess I stumped everyone,...
  5. Question: Polynomial

    by CWH68
    Answers
    1
    Views
    475

    Hint: Say p(x) = (x-s)q(x) + r(x), where deg(r)...

    Hint: Say p(x) = (x-s)q(x) + r(x), where deg(r) < deg(x-s) = 1, which would mean that r(x) is a constant, say r0, so p(x) = (x-s)q(x) + r0.
    Then, p(s) = 0*q(s) + r0 = r0, is the remainder.
  6. Answers
    1
    Views
    637

    ln(x^x) = x ln x, so x^x = e^(x ln x). Now, ln...

    ln(x^x) = x ln x, so x^x = e^(x ln x). Now, ln (x^(x^x)) = (x^x) ln x
    = (ln x)(e^(x ln x)). Thus, x^(x^x) = e^((ln x)(e^(x ln x))).
    Thus, dy/dx = e^((ln x)(e^(x ln x)))*d/dx((ln x)(e^(x ln x)))...
  7. E(X) = mX'(0). Hint: Differentiate the Taylor...

    E(X) = mX'(0). Hint: Differentiate the Taylor series expansion of
    mX(t) at t=0.
  8. Answers
    1
    Views
    1,773

    Hint: cos(w) = sin(90-w)

    Hint: cos(w) = sin(90-w)
  9. Question: Physics

    by CWH68
    Answers
    1
    Views
    692

    Differentiate v with respect to t. (a = dv/dt)

    Differentiate v with respect to t. (a = dv/dt)
  10. Question: Find the angle...

    by CWH68
    Answers
    1
    Views
    618

    To show that angle KPA = angle KQA = 90 - angle...

    To show that angle KPA = angle KQA = 90 - angle PAQ, note that PK is perpendicular to AQ and intersects AQ at, say, R. Similarly, QK is perpendicular to AP and intersects AP at, say, S. Triangles...
  11. Answers
    1
    Views
    1,827

    I think that they want you to prove that f(x,y)...

    I think that they want you to prove that f(x,y) is differentiable on U, as it is not well-defined on all of R2. For example, what is f(3,4)?
  12. Answers
    6
    Views
    1,270

    In this case, lambda = 0 is not an eigenvalue, as...

    In this case, lambda = 0 is not an eigenvalue, as the only solution that corresponds to it is the trivial solution. The only real eigenvalue in this case is lambda = -(ln(2+sqrt(3)))^2. A...
  13. Hint: The water in tank alpha is wa(t) = 48 -...

    Hint: The water in tank alpha is wa(t) = 48 - (16/5)t
    t/
    The water in tank bravo is wb(t) = 48 + | (-(t/3) -1) dt.
    ...
  14. Question: Billiard ball

    by CWH68
    Answers
    2
    Views
    519

    In an inelastic collision, the total kinetic...

    In an inelastic collision, the total kinetic energy after is less than the total kinetic energy before the collision. My bad. Hope this helps.
    -CWH :-)
  15. Question: Billiard ball

    by CWH68
    Answers
    2
    Views
    519

    Hint: Use the law of conservation of momentum. ...

    Hint: Use the law of conservation of momentum.

    m1v*1 + m2v*2 before = m1v*1 + m2v*2 after.

    Here, v* denotes the velocity vector, and v denotes the speed.

    In an elastic collision, kinetic...
  16. Question: Ph calculation

    by CWH68
    Answers
    1
    Views
    363

    Hint: Adding any amount of a stronger...

    Hint: Adding any amount of a stronger concentration of HCl will lower the pH.
  17. Answers
    6
    Views
    1,270

    You must have a typographical error in the...

    You must have a typographical error in the problem, because the boundary conditions that were given allow y(x)=x to be an eigenfunction corresponding to lambda = 0, and y(x) = sin (2Pi x) to be an...
  18. Answers
    6
    Views
    1,270

    To show that the above boundary value problem is...

    To show that the above boundary value problem is not a Sturm - Liouville problem, observe that the general solution to y'' + hy = 0 is:

    y = A cos x sqrt(h) + B sin x sqrt(h). As y(0) = 0, ...
  19. Question: Chemistry

    by CWH68
    Answers
    1
    Views
    633

    1.75 g Zn x (1 mole Zn/65.38 g Zn) x (1 mole Zn/...

    1.75 g Zn x (1 mole Zn/65.38 g Zn) x (1 mole Zn/ 1 mole ZnS) =

    0.02677 moles ZnS will be produced, which is

    0.02677 moles ZnS x (97.44 g ZnS/ 1 mole ZnS) =

    2.608 g ZnS will be...
  20. Question: Physics Question 1

    by CWH68
    Answers
    4
    Views
    950

    True. The angle of the brush is not known. Call...

    True. The angle of the brush is not known. Call it a. Then,

    F = 12N / (cos a - 0.2 sin a) provided tan a < 5. Otherwise, he cannot push the brush up.

    P. S. a is the angle of the brush...
  21. Answers
    1
    Views
    872

    E = hv where h= Planck's constant = 6.626 x 10-7...

    E = hv where h= Planck's constant = 6.626 x 10-7 erg sec, and v is the frequency.

    So the energy is (6.626 * 10^-27 erg sec)(5 * 10^12 sec^-1) = 3.313*10^-14 erg.
  22. Question: Physics Question 1

    by CWH68
    Answers
    4
    Views
    950

    He pushes it up with a force of 12N, to cancel...

    He pushes it up with a force of 12N, to cancel the force of gravity.
  23. Question: Physics problem

    by CWH68
    Answers
    3
    Views
    418

    Correction 1033.6 cm H2O. I hate typing on this...

    Correction 1033.6 cm H2O. I hate typing on this phone!
    -CWH :-)
  24. Question: Physics problem

    by CWH68
    Answers
    3
    Views
    418

    Correction 103.36 cm H2O.

    Correction 103.36 cm H2O.
  25. Question: Physics problem

    by CWH68
    Answers
    3
    Views
    418

    The water column that will give the same pressure...

    The water column that will give the same pressure would be:

    76 cm Hg x 13.6 g/cc Hg / 1.0 g/cc H2O = 1035.2 cm H2O.
  26. Answers
    1
    Views
    1,240

    Know title and lyrics. Who sang this song?

    This pop song came out between 1981 & 1984. It's called "Face to Face". The lyrics start like this: "Face to face. Every day. Face to face. Eye to eye. Face to face. Young dog's in love...."
    ...
Results 1 to 26 of 27