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Retired NBME 22 Answers

nbme22/Block 1/Question#9 (reveal difficulty score)
A 54-year-old man has an aneurysm in the ...
2.4 🔍 / 📺 / 🌳 / 📖
tags: calculation

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 +17  upvote downvote
submitted by ∗keycompany(351)
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loFw etaR = yolectiV x stSiloCnerocs-a earA

2 2c^m x 20 ccem/s x 06 ns/cemi x 1 000L,1/ c^m3 = 2.4 /mLni

10,00 3c^m = 1 L

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seagull  lWl,e I sesimd ihst .noe I 'ntdo vene elef b.ad +78
link981  a@keynpymoc a allms ,poty 010 c^3m = 1 L ont 13m^0c00. 0 010 mL=^3 1 L +1
hello  @myaypkcneo owh ddi yuo idte oryu oalrnigi eomtnmc ot fix rouy y?tpo +1
winelover777  Ptyter uers amkyy@oenpc was tcerco.r 1 L = 0100 .3c^m ewOiserth hte swnrae doulw be 42. +4
drdoom  1 eercnttmie si a andicst.e A( nle)i. +1
drdoom  If ew pyllmuti a elin yb nretaho nl,ie we teg a efscaru aae.r (A ieepc fo p.)earp +1
drdoom  If ew ltmyplui hte cepei of ppare yb tanhroe lein, we gte .evmluo A( ubc.e A oxb.) +1
drdoom  fI ew llif teh xob whit a lfiu,d ew ilwl have 1 Lm of shti idf.lu +1
drdoom  fI we veha a uodntsah fo seeth s,xoeb ew ahve 1 L of ud.fli +1
drdoom  oo1o, mL = 1 Lietr = ooo1, ecnte³irmte +1

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

+5/- ribosome01(-3)

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 +6  upvote downvote
submitted by ∗nwinkelmann(366)
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Iv'e nrvee nebe odog ta ionvetcrgn insut :( oll os had to ska my .rrheotb He odtl me ht:at

tncsieda × cnasdeti = dicntsea2 = raae

,adn

teacisdn × sidtance × acenitds = ctinesad2 × diaecstn = cnaeitds3 = ueolvm

Gotat evol icblup coohls fro nreve bnee uahttg htta ... esegh ylobiov(us I'ev ndeo the uiqesnota and uf,fst sujt enrve nbee oldt ti thta ata/whty pielsm .efe)bro nnowKgi tath esakm fgirguni uto teh nautoeiq cmhu eiars:e

owFl taer = ietyclvo × ACS = 02 cecms/ × 2cm2 = c40m3/esc

To rovncte to mL,/ni jtus lulptiym:

4cm03ces/ × 06 incsme/ × 0c/01L0m1,3 = 0204 00/L10, mni = .42 /nLmi

eopH siht he!lepd

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impostersyndromel1000  ot lla my icpblu soochl spepe uto reteh (dan ont teh nice bpcuil oshslco ni hcir eaa,rs teh rlae lupbci s.lc..hs)oo ew emad i!t +4
angelaq11  lhlykfTanu I wsa htgaut how ot tocevnr ,nisut but tle me tlle uyo ahtt I wsa SO ostl on siht en.o It's SULESSE to nkwo how ot do ti if ouy ,(I I eanm I) t'don kwon the mdan raulmfo x.D yOvlousib tgo tshi neo gnor,w utb sti' doog to ownk htat fi it erev ecmos pu aniag d(an I wkon ti ntwo)' I aeydlra okwn .ti +2

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

+3/- majoav1(2)

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 +2  upvote downvote
submitted by seracen(15)
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U,hg ,ysror tgitegn dues ot eth traingmf,to dna dyilaetlccan otpsed it in teh wnorg eapl.c

ay,Awsyn ot ieea,terrt I laywas sujt okol ta het nu.tis It watns ,mLni/ mI' vigen ^2cm and mcesc/

So I tl,ulpmiy ot teg oeumlv out of it m()3^c, then orntvce essdocn ot tn.smeiu

hus,T 'tis aiballcsy ,x226x in some eshap ro orfm rtefa napilgc hte eisadmlc ylrarpp.ipateo oodG nihtg yhte di'dnt add thta lraptuicar weknlir, 'Ill ktea my demilera tham slksli dna gbu to,u .a.a.hh

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 +1  upvote downvote
submitted by googaga(2)
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Teigtns nitgets 231. sTih si a tset tops to ees if sihtng nu amsrc lbe yb iygntp a nmoemct. naTh.ks

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drdoom  i strceep isht ettpmta utb i dn'to thkin ti sowkr hatt awy +2


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 +0  upvote downvote
submitted by ∗usmleboy(19)
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iThs eiusotqn was on my MACT dna I gadlehu ehnw I aws .ti

hTinsg uyo veag ot k:won ^mc3 = mL , hten who to ovtecnr usi.tn

2^cm2 x 20 sm/cce = ^3mc40 / ces = 40 Lm / esc

mFro ereh just corenvt 04 mL / esc to L / min

40 Lm / ces x 1 L / 1000 mL x 60 ces / 1 muenit = 42. L / nmi

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 -1  upvote downvote
submitted by ∗kernicterusthefrog(139)
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stJu ni asec htta ylvloe teitll tqeiuano ievdoprd yb @yenapcykmo awnst' ieutq neugho fro o,yu eehsr' a knil ot a erom oetcmlpe npxitnoleaa by aKnh yme.Aacd pHelde em, ewnh I olekod at teh einutoaq and adis, ?haaawa

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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!

+4/- seracen(15)

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