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mathefaro:
You still haven't told me where I got it wrong o, you got 32cm like I did after modifying your post, does that mean also wrong? (The only mistake I can see in my solution is typographic "+" instead of "-" which didn't affect my actual computations)
BTW, compare the solution you gave to mine and tell me which is more confusing and which is more explanatory. And would you mind giving us a diagram to buttress your explanation? I think that will throw more light to this......

before solving such question u must understand d image given and d lens use.....lets not make dis an issue iam waiting for ur explanation on density

lets deliberate on d topic density after den we will answer few question.....so guys what idea do u have on dis topic

mathefaro:
f=12cm; v = 3u
Using the mirror formula, 1/f = 1/u + 1/v;
1/12 = 1/3u + 1/u
multiplying through by 12u (l.c.m.), we have
12u(1/12) = 12u(1/3u) + 12u(1/u)
u = 4 + 12
u = 16
Therefore v = 3*16 = 48
Therefore, the distance between the object and image = u + v = 16 + 48 = 64cm
(I forgot it's a real image so it's i nthe front of the mirror, which is the same side on which the object is)
v + u = 48 - 16= 32cm
According to Hooke's law, f = ke
F1 = 5N, e1 = 0.56cm, f2 = 20N, e2 = ?
F1/e1 = f2/e2
5/0.56 = 20/ e2
e2 = 4*0.56 = 2.24cm

guy u are good dat is d truth but u have to see boyond d question dat is given before solving it

lemme no if u are not clear

i got d question from jamb past questions after solving it i notice dat my answer is not even among d options provided same so i tink dey are wrong because dey said d answer is 32.....
First d image is real dat makes it positive
second we are not solving for d object distance alone
1_ =1_ + 1_
12 3u u
d l.c.m is 3u

1_=1___+3 =48_ =16
12 3u 3
mag=v_
u
3*16=48 is d distance between both of dem
48-16=32

mathefaro:
what does this mean, that I'm wrong? I'm anxiously waiting for your correction......Albeit the post have been modified.

no doubt d second question u got it ryt but d first is wrong

i first question is wrong not d second one so answer d first

i no dis is very short but am kind of busy ryt na update resume later

physics.......as a physicist if u are not good with unit it is easy for u to b thrown off balance in physics we have two physical quantity which are fundamental and derived unit. Fundamental unit are unit which can not broken down because dey occur in a single form e.g
fundamental unit unit name/abbrev
Length metre m
time second s
temperature kelvin k
luminous intensity candela cd
mass kilogramme kg
cureent ampere A

we also have derive a combination of fundamental unit e.g
derived unit unit name abbrev
velocity metre persec ms-1
force newton N
density kilograme cubicmetre kgm-3
potential difference volt v
acceleration mete persec square
charge coloumb Q
resistance ohm
inductance henry H
capacitance farad f
magnetic field tesla T
magnetic flux weber w

try again

#a lens of focal length 12cm form an upright image three times d size of a real object. D distance between d object and d image is. #a load of 5N gives an extention of O.56cm in d wire which obeys hooke law. What is d extention cause by a load of 20N

hey guys dont tink dat i fail to keep my promise by not updating after writing few pages today everytin wiped out

Physics update[code][/code]

Hey my people how una dey

manued today na today

up united hahahahahahahahahahahhahaa today everton go show una pepper

van persie na negative for dis match

e b like say van gaal drink fanta come field today match na gbooooa waiting for lukaku to shake united net in d next ten minute

gudmuni my people...happy sunday. Let me start with apology am greatly sori for disappointing u guys again. I have loss many fans due to lack of serious. Dis thread will now b functioning everyday. Today is our cultural harvest u all are invited. Hope iam forgiven

hey guys jamb may draw d exam date back so guys dont sit on d fence so dat u will not live a dog life.. Study

guys before i go update....make una tell me d differences between moving coil galvanometer and hot iron ammeter. Guys before u una resonate with my question make una wave for mind so dat u guys will b frequent with maximum velocity. Jst before i accelerate to d next level make my weight no become scalar

Make una no blame me if i no update glo network jst Bleep me up am using somebodys fone na

[color=#006600][/color] chemistry update come up ........... Physics update comes up later in d day

happy weekend pals....i must update today first i nid questions dat will ginger me up. So guys kip it coming

after working today i discovered dat i cannot update again because d stress is tooooooooo much. Tomoro i will update. Abeg make una no vex body nor b fire wood.....hope una understand

how una dey my people

update resume tonight

our online lecture start next month if u are interested u can drop d subject dat u are writing in jamb on d tread below....u can also send a msg to my email @benjaminokpamen@gmail.com if u nid a private lecture i may b able to help u out

happy sunday my people.........hope say una never forget d latest news oh......jamb has decided to use pepper to rub people's eyes next yr by anoder method ooo

they have ....... D bell

I have one english question here very confusing.......
the bell has been........
A. Rang
B.ring
C.ringing
D.rung

Iam not a guru in mathematics but it look con fusing to me sha.....tanks for d answer