Quantcast

Got Homework?

Connect with other students for help. It's a free community.

  • across
    MIT Grad Student
    Online now
  • laura*
    Helped 1,000 students
    Online now
  • Hero
    College Math Guru
    Online now

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

adev Group Title

For problem 1 of challenge problems for units and dimensional analysis, im confused on section 1.10 of the solution. How does Y = -1 and Z = -1?

  • 8 months ago
  • 8 months ago

  • This Question is Open
  1. theEric Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Hi! I won't be on too much longer, but maybe I can help. I don't know what the question or solution are, though, since I'm not in the course. Feel free to provide that information, so that other people on OpenStudy can help!

    • 8 months ago
  2. adev Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Problem 1: An ideal (non-viscous) liquid with a density of ! is poured into a cylindrical vessel with a cross-sectional area of A1to a level at a height h from the bottom. The bottom has an opening with a cross-sectional area A2. Find the time it takes the k=liquid to flow out. I'll post the link to the solution because copying it would take up too much space. http://ocw.mit.edu/courses/physics/8-01sc-physics-i-classical-mechanics-fall-2010/introduction-to-mechanics/units-and-dimensional-analysis/MIT8_01SC_problems01_soln.pdf

    • 8 months ago
  3. kimkelle Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Hi, I just finished the set of questions. Well, to answer your question as to how is Y = -1 and Z = -1, Considering equation 1.10 and analyzing using dimensions, we obtain, [T] = [L]^y/[L]^(-z) Which leads to y+z = 0 since there is no [L] dimension on the LHS Further implies y =-z which implies that these quantities cancel out giving y=1 and -z=1. This is how I have understood it, let me know what you think?

    • 8 months ago
  4. adev Group Title
    Best Response
    You've already chosen the best response.
    Medals 0

    Ah ha! That makes sense, I forgot to use dimensional analysis for that last equation. Thank you for clarifying :)

    • 8 months ago
  5. kimkelle Group Title
    Best Response
    You've already chosen the best response.
    Medals 1

    Yes is it easy to miss :)

    • 8 months ago
    • Attachments:

See more questions >>>

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.