Are My Test Review Answers Correct?

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Homework Help Overview

The discussion revolves around a test review involving multiple physics problems, specifically focusing on calculations related to mass, velocity, and wave properties. Participants are seeking validation of their answers and addressing conversion issues in their calculations.

Discussion Character

  • Exploratory, Assumption checking, Problem interpretation

Approaches and Questions Raised

  • Participants are sharing their attempts at solving the problems, noting specific issues such as unit conversions from grams to kilograms. There is a focus on recalculating values after addressing these conversions, particularly in relation to velocity and wave properties.

Discussion Status

Some participants have provided feedback on the necessity of unit conversions, suggesting that this will lead to more reasonable results. Others are actively redoing their calculations and seeking further verification of their revised answers. The discussion is ongoing with multiple interpretations being explored.

Contextual Notes

Participants mention constraints related to the number of posts required to share images, which may affect the ability to provide visual references for their work. There is also an emphasis on ensuring that all calculations are based on correct unit conversions.

iirevolverii
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Hey hows everyone doing, this is the first time I am 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.

Homework Statement



On image.

Homework Equations



On image.

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.

www.imghost.cc/files/1b9puskkr5mofc56qvh8.jpg[/URL]

[PLAIN]www.imghost.cc/files/4d755578ezxik4w2kf8g.jpg[/URL]
 
Last edited by a moderator:
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thanks for fix the links..

Someone please 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:
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
 
kalery said:
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

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:
I just redid problems 2 and 3 with the correct conversions.

You will have to fix the links, it won't let me because I don't have 15 posts.

vvww.imghost.cc/files/l2mjf2aws0n63fafwxbm.jpg

vvww.imghost.cc/files/377doh319isr7usmkatz.jpg
 
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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