Anyone out there that can give me the correct formula for the dimensional analysis math I am trying to refresh my brain as we start next week and have a math test on that thursday so please anyone?Thanks 0 Likes
Daytonite, BSN, RN Specializes in med/surg, telemetry, IV therapy, mgmt. Has 40 years experience. 4 Articles; 14,603 Posts Jan 11, 2008 there are weblinks to tutorials on dimensional analysis math on post #3 of this sticky thread:https://allnurses.com/forums/f50/nursing-math-thread-264395.html - the nursing math thread (in the general nursing student discussion forum) 0 Likes
catzy5 1,112 Posts Jan 11, 2008 Anyone out there that can give me the correct formula for the dimensional analysis math I am trying to refresh my brain as we start next week and have a math test on that thursday so please anyone?ThanksMy favorite kind of math. To me it just makes so much sense.I'll try and explain it as I understand it.you have a problem and that problem has an equivalent for example.1kg is equal to 2.2lbs 1kg=2.2lbsproblem will read:14kg is how many lbs?the thing you need to know how to do is set the problem up so the "like" formats cancel each other out. 14kg X 2.2lbs/1kg= 30.8lbsIn this case because we are going kg to lbs we multiply 2.2lbs over 1 kg. The units of measure kg cancel each other out and you are left with the correct units lbs.If you were trying to find how many lbs you would reverese that and divide by 2.2lbs the units lbs would cancel and you are left with kg. If you know your equvalents then you can do absolutely any problem that way.2. How many mL in a qt of milk?if you don't know your equavalent for qt to mL how about oz to mL and make it a two step problem..1oz=30mL1Qt=32oza) convert qt to ounces 32ozb)convert ounces to mL32 ounces times 30mL equal to 10z32oz X 30mL/10zagain make sure you can cancel your units of oz to end up with units in mL.hope that helped. 0 Likes
Daytonite, BSN, RN Specializes in med/surg, telemetry, IV therapy, mgmt. Has 40 years experience. 4 Articles; 14,603 Posts Jan 11, 2008 there is no "formula" per se for dimensional analysis. you will use formulas for drug calculations. dimensional analysis' other name is the "factor label method". the reason it is called this is because you set up your problems so that the descriptive labels that go with the numbered terms are arranged so they can be factored out and you are ultimately left with the labels that you want on the final answer. often, it involves ending up with a ratio (fraction) where you have numbers in the numerator and denominator with a "label" attached to each, although not always. these labels are things like "mg", "gram", "ml", "cc", "units", etc. please read the tutorials i referred you to. you can see many problems that i have worked for students by dimensional analysis on this thread: https://allnurses.com/forums/f205/dosage-calculations-88867.html 0 Likes