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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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Flow eatR = oielVyct x itraseo-ScnCslo eAar

2 ^m2c x 02 cmesc/ x 06 mens/ic x 1 00/,L01 ^c3m = 42. L/nmi

10,00 cm3^ = 1 L

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seagull  Wl,le I esdism itsh oen. I tdo'n enev efle .dab +78
link981  @ymcakpenyo a lmsal ,tpyo 100 m^3c = 1 L otn 00m^3.0c1 0010 m3=L^ 1 L +1
hello  pkymnyoe@ac hwo idd oyu tdie oryu ngoilrai mtnmoec to ixf uory o?typ +1
winelover777  Pryett resu @cmeynykaop saw re.ccrto 1 L = 0001 cm^.3 iOheswert eht anwsre lwodu eb 2.4 +4
drdoom  1 ecitetnrem is a icatn.sed (A )nil.e +1
drdoom  fI ew tlupimyl a lnie by tranheo il,en ew get a fusecra are.a (A peeci fo re.)pap +1
drdoom  fI we lliumpty eth peeic fo rpape by noharte inel, ew tge .eolvmu A( .ubec A x.ob) +1
drdoom  fI we lifl eht obx thiw a f,lidu ew ilwl haev 1 Lm of iths l.udif +1
drdoom  fI we have a atduohns of heest sbx,oe we ehva 1 L of .udfil +1
drdoom  ooo1, mL = 1 rLeti = 1oo,o t³tnmiceere +1

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


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 +6  upvote downvote
submitted by nwinkelmann(366)
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I'ev nerev nebe dgoo at tgenincvro tusni :( oll so ahd ot aks my .hrtbreo eH dolt me tah:t

niseactd × eincastd = inceatsd2 = eara

an,d

isndetca × sadctnei × dnsiteca = andesitc2 × ctdseina = sndaetci3 = oumelv

aottG vole ibpluc colhos fro nveer neeb ghtuta atth ... egshe ulyiv(sboo I'ev deno eht eutiqsano dna f,utfs usjt venre eebn tlod ti ttha wat/ayth mpelis f.oe)ebr nnoKwgi ttah kaesm nuriiggf uto hte onitaque umhc :aiseer

lwoF trea = eotvcyil × SCA = 20 mcs/ce × 2cm2 = 0cm43ecs/

oT voercnt ot /nL,mi stju p:ylimtlu

m4c03/sce × 06 smenc/i × /11000L,cm3 = 0240 /0,10L0 inm = 2.4 imL/n

peHo shit dhle!pe

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impostersyndromel1000  to lal ym cupbil slhcoo eespp tuo etehr n(da otn hte ienc cubpil csoshol in crhi rase,a eth aerl upblic shc.l).os.o we adem t!i +4
angelaq11  Tlulyankhf I wsa ttghua ohw to retnvoc iut,sn btu tle em letl yuo ttha I swa SO olts no sith eno. s'tI SSULEES ot kwon hwo to do it if oyu ,I( I aenm I) dnot' okwn the ndma lufamro Dx. uyivoOslb ogt shit oen ornwg, tub tsi' godo to wkon ahtt fi ti evre mcseo pu giaan nd(a I oknw ti ot)w'n I daeyral knwo it. +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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hgU, soryr, etigtng deus to eth atmofrtig,n and iadealcntcyl dtspoe ti in teh onrgw ce.pal

swyn,Aay ot eieetartr, I lyaswa ujts look ta eth iun.st tI wsatn ,Lin/m I'm einvg mc2^ and scmce/

So I utlpimy,l to etg oumevl out fo ti ^m(,3)c tnhe eonvrct cnsodse ot steumin.

su,hT i'st lsaabilcy x2,62x ni msoe aehsp or mofr rafte cpngial teh seildacm erylppptiar.oa oodG tginh htye tddin' dda htat arrlcuiatp lw,nkier 'llI ktae ym riemeadl tmah illsks dan bgu ut,o .hha..a

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 +1  upvote downvote
submitted by googaga(2)
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igenTst ttngise 2.31 sThi si a sett opst to ees if itnshg nu mcasr bel by tgypin a motmnec. Ta.hkns

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drdoom  i csterpe tsih tpeatmt but i 'ondt nhkit it swork that ywa +2


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 +0  upvote downvote
submitted by usmleboy(19)
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Tshi qnouiest aws no ym CATM adn I hedglau hwne I wsa it.

sinThg oyu geva ot :kown 3m^c = mL , ehtn woh to ovntrec tuni.s

m2^c2 x 02 ms/cec = mc34^0 / esc = 40 Lm / sec

rmFo eehr utsj onervct 40 Lm / sec to L / nmi

04 Lm / ecs x 1 L / 1000 mL x 60 ecs / 1 nuteim = 4.2 L / min

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 -1  upvote downvote
submitted by kernicterusthefrog(139)
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ustJ ni eacs ahtt ellovy ltilte utoqaein operivdd by pcyy@aenokm tw'san tequi egunho orf ,ouy 'reesh a nilk ot a more oeepltmc apnoaixlent yb hnaK ydaAmce. eelpHd me, nhwe I lodoek at eth qeoatuni nda das,i ahawaa?

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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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