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NBME 22 Answers

nbme22/Block 1/Question#9 (56.4 difficulty score)
A 54-year-old man has an aneurysm in the ...

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submitted by keycompany(308),
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owFl tRea = lyocVeti x nSa-rosostCliec rAea

2 2^mc x 20 ccmes/ x 06 cisen/m x 1 00L,01/ cm3^ = .24 imLn/

10,00 m3c^ = 1 L

seagull  Well, I missed this one. I don't even feel bad. +63  
link981  @keycompany a small typo, 100 cm^3 = 1 L not 1000cm^3. 1000 mL^3= 1 L +  
hello  @keycompany how did you edit your original comment to fix your typo? +  
winelover777  Pretty sure @keycompany was correct. 1 L = 1000 cm^3. Otherwise the answer would be 24. +3  
drdoom  1 centimeter is a distance. (A line.) +  
drdoom  If we multiply a line by another line, we get a surface area. (A piece of paper.) +  
drdoom  If we multiply the piece of paper by another line, we get volume. (A cube. A box.) +  
drdoom  If we fill the box with a fluid, we will have 1 mL of this fluid. +  
drdoom  If we have a thousand of these boxes, we have 1 L of fluid. +  
drdoom  1,ooo mL = 1 Liter = 1,ooo centimeter³ +  

if one still doesn't understand to add on .. 1000 cm^3 = 1000 ml 1000ml = 1 Litre

+4/- ribosome01(-3),

submitted by nwinkelmann(292),
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v'eI neerv eneb odog at eirvcgotnn tisun :( lol so ahd ot ksa my e.trohbr He dtlo em that:

scdtinea × dniatecs = ecdtsnai2 = aera


sencdait × sciedatn × ncsatide = disacent2 × iadnsetc = eidcasnt3 = eolvmu

totGa olev pubilc lohsoc rfo veenr neeb tghuat ahtt ... sheeg iv(lbsouyo eI'v nedo eht ioaneutqs adn tuf,sf jtus nvree neeb tdlo ti atht awhtyat/ slipme feobe.r) ongiwKn thta kmeas grnuigif out hte etiaunoq muhc ries:ae

lowF reta = vlceyiot × ACS = 20 /emscc × 2cm2 = m40c3sec/

To nrvtoce to m/,inL usjt itu:llmyp

m0c43/esc × 60 nisce/m × 10L1cm00/,3 = 0024 /L,0100 inm = 4.2 /imLn

peoH hsit edhep!l

impostersyndromel1000  to all my public school peeps out there (and not the nice public schools in rich areas, the real public schools)... we made it! +3  
angelaq11  Thankfully I was taught how to convert units, but let me tell you that I was SO lost on this one. It's USELESS to know how to do it if you (I, I mean I) don't know the damn formula xD. Obviously got this one wrong, but it's good to know that if it ever comes up again (and I know it won't) I already know it. +1  

This is all you need for conversions:

1cm3 = 1 ml ... thus 40 cm3 = 40 ml

So to make it faster I would do it like this

40 ml/sec * 60 sec/1min * 1L/1000ml = 2.4 L/min

+/- majoav1(0),

submitted by seracen(13),
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Uh,g sy,rro tengitg usde ot teh ogiarftt,mn and caliltdyanec dpstoe it ni hte ogrnw l.apce

sw,yaynA ot itre,eerta I wysaal stju kool ta the isnt.u tI sawnt n/Li,m 'Im gvein c2^m dna cecms/

So I tu,myilpl ot egt mouvle otu of ti (mc3,)^ nhet tcnvreo ncsedso ot steuim.n

suh,T ti's calsaiylb 22x,x6 ni emos phaes ro mrof afret pcgialn hte mldesaci oiarp.prlypeta odoG hntgi tyhe dndt'i add ttah lrriaacput rlkie,nw Ill' keta my iamreled athm slklsi dan ugb out, aah.h..

submitted by kernicterusthefrog(112),
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sJtu ni cesa taht ovlyle lilett uotqniea rvdopdei yb ey@mpnoykac wtn'as qutei huoneg ofr o,yu ees'hr a lnki ot a rmeo competle tpoaninaelx yb ahnK amAycde. eHedpl me, nwhe I ekdool ta hte ateoqiun adn ,idsa awaa?ah

If, like me, you dislike memorizing formulas, but are okay doing the actual math, I always just look at the units. It wanted L/min, and I had to get it using cm^2 and cm/sec...

Well, I know cm^3 gives volume (L) after bashing out a few conversions, so multiply it is!

Then I know to turn seconds into minutes, so multiply by 60.

Now, at this point, I knew my decimals were off, but still, 4x6 = 24, so it's some version of that. Had they included 24 or .24 as answers, I'd have actually had to pay attention to my conversions.

Anyways, I hope that helps!

+3/- seracen(13),

submitted by usmleboy(10),

This question was on my MCAT and I laughed when I saw it.

Things you gave to know: cm^3 = mL , then how to convert units.

2cm^2 x 20 cm/sec = 40cm^3 / sec = 40 mL / sec

From here just convert 40 mL / sec to L / min

40 mL / sec x 1 L / 1000 mL x 60 sec / 1 minute = 2.4 L / min

submitted by googaga(1),

Testing testing 123. This is a test post to see if things un scram ble by typing a comment. Thanks.

drdoom  i respect this attempt but i don't think it works that way +