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Homework Help: Plz check over my work (Univ. Grav. Law,Max Compr.,Standing waves,Ideal Gas Law

  1. Apr 27, 2008 #1
    Hey hows everyone doing, this is the first time im posting HW.
    I need help with 4 problems which are from my test review.
    Attached are scan images of the test review sheet with solved answers.
    I need to know if I have done this right. Thanks.

    1. The problem statement, all variables and given/known data

    On image.

    2. Relevant equations

    On image.

    3. The attempt at a solution

    On image.

    Youll have to fix the links. When you see the image, just right click and save on desktop to preview in small version, because the image is big. Thanks.


    Last edited by a moderator: Apr 23, 2017
  2. jcsd
  3. Apr 28, 2008 #2
    thanks for fix the links..

    Someone plz check over my work.
    I did notice for question numbers 2 and 3, i forgot to convert the grams to kilograms.
    Once I go home from work, will sovle them with the converted numbers.
    Last edited: Apr 28, 2008
  4. Apr 28, 2008 #3
    On problem #3 you need to convert the mass to kilograms when calculating the mass-per-unit-length in the velocity equation.

    Your numbers will turn out more reasonable. 22 m/s on a short string seems a bit much :p
  5. Apr 28, 2008 #4
    I just did that and what i got for velocity was 673 m/s.. this is way more than the previous answer of 22 m/s.

    After converting the grams to kilograms.. this is what i got for problem #'s 2 and 3.
    2) A = 0.146 m
    t = 0.160 s

    3) v = 673 m/s
    wavelgenth = 3.00 m
    f1 = 224 hz
    f3 = 673 hz

    Did I do the rest correctly?
    Last edited: Apr 28, 2008
  6. Apr 28, 2008 #5
    I just redid problems 2 and 3 with the correct conversions.

    You will have to fix the links, it wont let me because I dont have 15 posts.


  7. Apr 29, 2008 #6
    Can anyone please check over my work.. I need to know if what I studied is right.
    I will greatly appreciate it.
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