Eben331's Posts

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Education › Re: UI 2018/2019 Admission Thread by Eben331: 2:53pm On Jul 26, 2018

Damayogenius18:
Maybe I should give u some warming up b4 i come back....A 3kg ball moving at 8m/s strike a 2kg ball at rest.... If the collision is elaestic,what is the speed of each ball after collision ...its simple o.....

M1=3kg, U1=8m/s, M2=2kg, U2=0 (at rest), V1=?, V2=? Using law of conservation of momentum: M1U1+ M2U2=M1V1+M2V2 3*8+2*0=3*V1+2*V2 In elastic collision, the relative velocity of the balls will be unchanged in magnitude but reversed in direction; so V1=V2=V in magnitude 24+0=3*V1+2*V2 >>> 24=(3+2)V >>> 24=5V >>> V=24/5 >>> V=4.8m/s. Therefore V1=4.8m/s and V2=4.8m/s.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 2:39pm On Jul 26, 2018

Orezy5:
*CHEMISTRY*
3. Glucose and fructose exist in open chain forms known as A. Fischer's Projections B. Harworth's Projections C. Chiral projections D Laevo-rotatory Projections
...

D...Am I right?

Education › Re: UI 2018/2019 Admission Thread by Eben331: 12:31pm On Jul 26, 2018

Eben331:
See me see English o (1) Is the load __ heavy that you can't carry it alone? (a) much (b) so (c) very (d) too (2) The boys look alike that one can't know __ (a) who is whom (b) who is who (c) which is which (d) whom is whom (3) I will soon attend __ you (a) to (b) on (c) for (d) at (4) As __ now, Bakayoko is the best player (a) of (b) at (c) in (d) on (5) You should be __ the alert (a) at (b) on (c) in (d) by PLS EXPLANATIONS WILL BE NEEDED!

Education › Re: UI 2018/2019 Admission Thread by Eben331: 12:19pm On Jul 26, 2018

Damayogenius18:
....Eben,grace sent ur question to me but I don't know it was dat important cos a lot of ppl sent question to me den on what's app and my phone is not working well....I will repair it today by Christ grace...I don't think it is hard though....DAT was y I did not attempt it then.....maybe I will look at it later....m so sori....

no prob boss...welcome back!!

Education › Re: UI 2018/2019 Admission Thread by Eben331: 12:18pm On Jul 26, 2018

The correct answers are marked with *

Eben331:
(1) The magnification of a diverging mirror is 2/5, if the radius of curvature is 20cm, find the distance between the object and the image. (a) 21cm (b) 35cm (c) 16.7cm (d) 49cm * (e) none of the above. (2) Calculate the radius of curvature of a convex mirror given that the distance between the mirror and object is 15cm, and the distance between the mirror and image is 10cm. (a) 60cm (b) 45cm (c) 15cm (d) 30cm * (e) none of the above. (3) An incident ray of light is deviated through 150', calculate the glancing angle. (a) 90' (b) 95' (c) 75' * (d) 30' (e) none of the above. (n.b: where ' means degree)

Education › Re: UI 2018/2019 Admission Thread by Eben331: 8:12pm On Jul 25, 2018*

Orezy5:
*CHEMISTRY*

2. Burning with no sooty flame indicates the presence of
A. Alkene
B. Alkane
C. Alkyne
D. Arene

...

B - Alkene and Alkyne produce sooty flame. There is no homologous series called Arene.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 7:54pm On Jul 25, 2018

Orezy5:
*CHEMISTRY*
1. Which compound is responsible for the flavour and smell of beeswax? A. H3C - COO - C2H5 B. C17H35 - COONa C. C15H31 - OCO - C30H61 D. C2H5 - OCO - CH3
...

A - Esters give sweet smell

Education › Re: UI 2018/2019 Admission Thread by Eben331: 7:46pm On Jul 25, 2018

DKrown:
Is UI post utme computer based?

paper-pencil test

Education › Re: UI 2018/2019 Admission Thread by Eben331: 7:44pm On Jul 25, 2018

TeflonBlixx:
A string is put under a tension of 50N. A transverse wave setup in the string can be represented by y=0.25sin(2.28x-966t), where x is in meters and t is in seconds. Calculate the mass per unit length of the string?

mass per unit length M=50kg/m (approx)

Education › Re: UI 2018/2019 Admission Thread by Eben331: 1:48pm On Jul 25, 2018

DrBESTJC:
1) B
2) B
3) A
4) B
5) C

I got it all correct.....right?

you get questions 3, 4 and 5. I dnt knw dat of 1 and 2.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 1:45pm On Jul 25, 2018

(1) The magnification of a diverging mirror is 2/5, if the radius of curvature is 20cm, find the distance between the object and the image. (a) 21cm (b) 35cm (c) 16.7cm (d) 49cm (e) none of the above. (2) Calculate the radius of curvature of a convex mirror given that the distance between the mirror and object is 15cm, and the distance between the mirror and image is 10cm. (a) 60cm (b) 45cm (c) 15cm (d) 30cm (e) none of the above. (3) An incident ray of light is deviated through 150', calculate the glancing angle. (a) 90' (b) 95' (c) 75' (d) 30' (e) none of the above. (n.b: where ' means degree)

Education › Re: UI 2018/2019 Admission Thread by Eben331: 1:33pm On Jul 25, 2018

Eben331:
(2) A ball P of mass 0.25kg loses one-third of its velocity when it makes a head-on collision with an identical ball Q at rest. Q moves off with a speed of 2m/s in the original direction of P. Calculate the initial velocity of P. PLS SHOW YOUR WORKINGS!

MP=0.25kg, UP=u, MQ=0.25kg (since Q is identical to P), UQ=0 (at rest) But P loses 1/3 of its initial velocity (that is, u/3), VP-u-u/3=2u/3, VQ=2m/s Using Law of conservation of linear momentum: MPUP+MQUQ=MPVP+MQVQ 0.25*u+0.25*0=0.25*2u/3+0.25*2 >>> 0.25u+0=0.5u/3+0.5 >>> 0.25u=0.5u/3+0.5 >>> 0.25u-0.5u/3=0.5 >>> 0.25u/3=0.5 >>> 0.25u=0.5*3 >>> 0.25u=1.5 Make u the subject of the formula: u=1.5/0.25=6m/s. Therefore the initial velocity of P=6m/s

Education › Re: UI 2018/2019 Admission Thread by Eben331: 1:19pm On Jul 25, 2018

DrBESTJC:
Yes.....just noticed it.That's an implication of the question.

So one can just choose between options B and D in dis case...I can solve dat question 2 now...

Education › Re: UI 2018/2019 Admission Thread by Eben331: 12:48pm On Jul 25, 2018

DrBESTJC:
Solution:

17) Using the formula:
Half life = 0.693/decay constant = 0.693/10^-7 = 6.93 x 10⁶

20) 1/C = 1/0.3 1/0.5 1/0.2 = 10.3333
.: C = 1/10.3333 = 0.09677 = 0.1uF(approximately)

Thanks... I understand now but question 17 ans is nt among the options.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 12:32pm On Jul 25, 2018

DrBESTJC:
1) B
2) B
3) A
4) B
5) C

I got it all correct.....right?

I don't know the correct answers too. Arts students should pls help out. Cc: afoobabs, TheHistorian...

Education › Re: UI 2018/2019 Admission Thread by Eben331: 11:15am On Jul 25, 2018

@DrBESTJC, pls show the workings to questions 17 and 20 of ur physics questions.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 10:41am On Jul 25, 2018*

See me see English o (1) Is the load __ heavy that you can't carry it alone? (a) much (b) so (c) very (d) too (2) The boys look alike that one can't know __ (a) who is whom (b) who is who (c) which is which (d) whom is whom (3) I will soon attend __ you (a) to (b) on (c) for (d) at (4) As __ now, Bakayoko is the best player (a) of (b) at (c) in (d) on (5) You should be __ the alert (a) at (b) on (c) in (d) by PLS EXPLANATIONS WILL BE NEEDED!

Education › Re: UI 2018/2019 Admission Thread by Eben331: 10:27am On Jul 25, 2018

DrBESTJC:
I always post corrections to my questions naa........Abi you no de see am ?

Yes I dey see am

Education › Re: UI 2018/2019 Admission Thread by Eben331: 10:25am On Jul 25, 2018

@DrBESTJC, thanks, I really appreciate. But the ans they got for question 2 was 6m/s.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 7:20pm On Jul 24, 2018

(1) A bullet of mass of 20g is fired from a gun of mass 1kg. If the velocity of the bullet is 250m/s, calculate the backward velocity of the gun. (2) A ball P of mass 0.25kg loses one-third of its velocity when it makes a head-on collision with an identical ball Q at rest. Q moves off with a speed of 2m/s in the original direction of P. Calculate the initial velocity of P. PLS SHOW YOUR WORKINGS!

Education › Re: UI 2018/2019 Admission Thread by Eben331: 4:07pm On Jul 24, 2018

Obamahmud:
Pls! I want to study industrial chemistry,my jamb score is 213 and my subject combination is bio,chem,phy,eng.Am I good to go?

Check through this link on that - https://ui.edu.ng/content/advertisement-course-requirements

Education › Re: UI 2018/2019 Admission Thread by Eben331: 4:04pm On Jul 24, 2018

Nltaliban:
I'll try. You people should not tag me with physics questions again. I'm not good at physics and no longer do physics as a course here in ui

But your residual knowledge on Physics will still be useful to us here. You can still assist us in solving some questions you still know.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 10:57am On Jul 24, 2018

@Orezy5. Thanks but I will prefer you typing the answers out because i am using a 'small' phone. I'm sorry for any inconvenience this may give you.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 6:35am On Jul 24, 2018

DrBESTJC:
Thanks for this......really helpful.......more of it please..

You also use post more questions frequently bro. You should endeavour to also show corrections to them and workings if possible, to help one another on this thread.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 11:10pm On Jul 23, 2018*

(1) The tendon in a mass leg is 10cm long and 1cm in diameter. How much will it be stretched by a force of 157N if the Young Modulus for the tendon is 2*10^8N/m^2 (2) A steel bar of length 4m and of rectangular section 1cm by 2cm supports a load of 10kg. By how much is the bar stretched? take Young Modulus=2*10^11N/m^2 (3) A metal rod of diameter 7mm, length 100mm is made from steel of Young Modulus 2*10^11N/m^2. Calculate the force constant of the rod. PLS SHOW YOUR WORKINGS!!

Education › Re: UI 2018/2019 Admission Thread by Eben331: 7:12pm On Jul 23, 2018

@Aceed. I am using a press-button phone and u knw hw strenuous it is to type with it. If I am using a touchscreen phone, it will be much easier for me to show workings to calculation questions. So bear with me. I will try my possible best to solve ur questions.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 7:11pm On Jul 23, 2018

...

Education › Re: UI 2018/2019 Admission Thread by Eben331: 6:51pm On Jul 23, 2018

The correct answers are marked with *

Eben331:
(1) The type of motion that occurs during conduction is __ (a) translational motion (b) random motion (c) simple harmonic motion (d) vibratory motion * (e) oscillatory motion (2) Which one of the following is not used in the formation of a pure spectrum? (a) plane mirror * (b) convex lens (c) prism (d) slit (e) screen (3) A p-n junction diode can be used for __ (a) current rectification (b) voltage amplification (c) current amplification (d) voltage rectification * (4) The diode valve is an application of the principle of __ (a) thermionic emission * (b) photoelectric effect (c) seeback effect (d) Band theory.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 11:29pm On Jul 22, 2018

(1) The type of motion that occurs during conduction is __ (a) translational motion (b) random motion (c) simple harmonic motion (d) vibratory motion (e) oscillatory motion (2) Which one of the following is not used in the formation of a pure spectrum? (a) plane mirror (b) convex lens (c) prism (d) slit (e) screen (3) A p-n junction diode can be used for __ (a) current rectification (b) voltage amplification (c) current amplification (d) voltage rectification (4) The diode valve is an application of the principle of __ (a) thermionic emission (b) photoelectric effect (c) seeback effect (d) Band theory.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 10:57pm On Jul 22, 2018

Sammiecartier:
Guys get UI post utme past questions contact 07052081568

There is nothing like UI Past Questions, they always collect the questions back frm students since 2015. What we have is Sample Questions/Practice Questions which every candidate will see on his/her portal when registering.

Education › Re: UI 2018/2019 Admission Thread by Eben331: 10:34pm On Jul 22, 2018

miracood:
how did u get dat?

let V=rate of breathing per minute. Using the formula: P1V1/T1=P2V2/T2 P1=760mmHg, V1=16 breaths per min, T1=18^oC=(18+273)K=291K, P2=240mmHg, V2=? T2=-5^oC=(-5+273)K=268K. Make V2 the subject of the formula: V2=P1*V1*T2/P2*T1 By substituting the values, we have V2=760*16*268/240*291=46.66 breaths per minute or 47 breaths per minute (approx.)

Education › Re: UI 2018/2019 Admission Thread by Eben331: 2:24pm On Jul 22, 2018

Aceed:

What type of electromagnetic radiation
can be used to take photographs in the
haze?
A. Radio waves
B. Visible rays
C. Ultraviolet rays
D. Infrared rays

D - Infrared rays are easily detected by special photographic films and it can be used for taking photographs in haze.

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