Dimensions Chart: MLT, FLT, SI & English Units

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Discussion Overview

The discussion revolves around finding a chart or list that details quantities along with their dimensions using the MLtT (Mass-Length-Time-Temperature) and FLtT (Force-Length-Time-Temperature) systems, as well as the corresponding SI and English units. Participants express challenges in locating this information, particularly in the context of a Thermo-Fluids class.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Homework-related

Main Points Raised

  • One participant requests a source for a chart listing dimensions in MLtT and FLtT systems along with SI and English units.
  • Another participant suggests using the website efunda.com for unit categories, claiming it provides dimensional units for various quantities.
  • A participant expresses concern about a potential fee for accessing information on efunda.com.
  • Multiple participants assert that efunda.com is free to use, questioning the initial claim about fees.
  • One participant reports encountering a pop-up indicating that their free session was about to expire and mentions a membership fee for full access.
  • Suggestions are made to consult physics textbooks for unit tables, although one participant notes they no longer have a textbook.
  • Additional resources are provided, including links to EngNet and another unit conversion site, as alternatives for finding the needed information.
  • A participant expresses confusion about how to express certain dimensions, such as angular velocity, in the MLtT system and notes the absence of specific quantities like "Modulus of Elasticity" in available resources.

Areas of Agreement / Disagreement

There is disagreement regarding the accessibility and cost of information on efunda.com, with some participants asserting it is free while others report encountering fees. The discussion remains unresolved regarding the best sources for the requested dimensional information.

Contextual Notes

Participants mention limitations in their access to textbooks and specific resources, indicating a reliance on online information that may not comprehensively cover the MLtT and FLtT systems.

JSBeckton
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Sorry if its here somewhere but I couldn't find it, where can I find a chart/list for quantities listing their dimensions using the MLtT and FLtT systems and also give the typical SI and English units?

Thanks
 
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Go to www.efunda.com/units/ and you will find a list of unit categories. Click on anyone of them ... for example, click on "density". Then you'll get a list of various units of density. Click on anyone of them ... for example, click on "grams per cubic centimeter". Then you'll get the dimensional units in each of three systems you want.
.
Milton Beychok
(Visit me at www.air-dispersion.com)
 
they want me to pay a fee?
 
Otherwise, use the index in your physics textbook
(most will at least have a table with SI units)
 
JSBeckton:

What gave you the idea that www.efunda.com charges a fee?? That website is free ... anyone can read it without paying any fees!

Did you actually visit the site before you asked your question about whether they charge a fee?

Regards,
zbertz
 
zbertz said:
JSBeckton:
What gave you the idea that www.efunda.com charges a fee?? That website is free ... anyone can read it without paying any fees!
Did you actually visit the site before you asked your question about whether they charge a fee?
Regards,
zbertz
Sure I visited the site and after about 2 minutes a pop-up said that my free session was about to expire and everything that I clicked on led me to the membership page, which has a $6/month fee. (http://www.efunda.com/about/about.cfm) This page says that they charge a fee to pay their engineers who keep the information provided "credible"

I no longer have a physics book, this is for a Thremo-Fluids class, I can't believe that they don't have this information in there and I can't believe that this kind of stuff woud be hard to find on the internet. I know most of the SI units but the MLtT and FLtT is a bit vague. Anywhere else I can find it?
 
Last edited:
zbertz said:
JSBeckton:
What gave you the idea that www.efunda.com charges a fee?? That website is free ... anyone can read it without paying any fees!
Did you actually visit the site before you asked your question about whether they charge a fee?
Regards,
zbertz
It absolutely does. Some sections are not available if you are not a supporting member as well.

You can also try EngNet's list of units here:
http://www.engnetglobal.com/tips/convert.asp

Or try this:
http://www.projects.ex.ac.uk/trol/dictunit/index.htm
 
Thanks, I guess that I don't understand how to indicate the dimensions in the MLtT system. Does that mean that I'm supposed to express angular velocity for example with some combination of MLtT? I have not seen that anywhere, most of these sights have the common dimension and derived dimensions but I have not seen "Modulus of Elasticity" at any of these sites and certainally not in therms of MLtT? Any suggestions of where I go from here?
 

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