MrEgghead:
Over the past fours years, I've been a strong admirer and a follower of this thread..

Here, I met a lot of personalities whom their words had been a source of encouragement in my staunch pursuit for a place in the Medical school.

The founding fathers of this thread in Lagusta, Josh, Ashashacash, DrHesjay and a host of others with their constant contributions deserve mentions.

Bobola07, Historian, and many of whom I met on Ibadan's thread deserve mentions also. If I drop my former monicker, I believe many of you would accede with me that its been a long way coming.

I gained admission into a course I had never wanted but chose to accept it on the virtues of family pressure and the fear of being left behind by my friends but It was a decision I've cultivated ambivalent feelings about. I became a shadow of my old self, my results were nothing to write home about in my second year; I had many carry overs and this was as a result of jamb exam coupled with hatred for the path I've chosen, though I'll be done this year; my recovery was just God's grace.

But to cut the long story short, I've just been admitted into Medicine and Surgery by the University of Benin making me a full blown member of this thread and I dedicate this success to God and every member of this thread, Thanks and God bless you all.

abeylysis92:


1/u-1/v equals 1/f
Since v is negative, I guess

pabostt:


Don't be confused

1/f = 1/u 1/v

However, in calculation the value of v is negativeand the value of F is negative because most images formed in a concave lens always give virtual, erect, and diminished image wherever the object is placed.

I prepared a free preparatory physics guide in pdf for students who want to download https://servantboy.com/category/physics-for-a-level-&-utme/

Nltaliban:
*CHEMISTRY TIPS*
1. The most reactive metal known is Francium .

2. GEL is a SOL which contains more solid particle dispersed in liquid than usual.

3. The hardest substance known to man is DIAMOND .

4. The lowest Oxidation State of IRON is ZERO

5. Quantum Numbers only describes ELECTRONS and not ATOMS.

2Lynx:

But I thought there is more list yet to be out

TeflonBlixx:


1. Arboreal. . They 'live' on trees

2. Hermophrodite. . Monoecious flowers are not capable of self pollination

3. Cryptic colouration

4. Pancreas. .

5. Fatty foods cause obesity. . Magarine and butter

6. Prevents water logging. . Clayey soils are known for their soil water rententivity. . Adding of slake lime, Caco3 or gypsum helps loosen up the texture thereby reducing water logging

7. Occupy different ecological niches

8. Chisel like front teeth. .

9. C

10. Pericycle. . I'm not well versed in supporting tissues in plant...

11. Soil is already present. . From my soil science knowledge, primary succession is mostly slow due to weathering process of parent materials. . Believe me bro, weathering is a slow process..

Eben331:
@DrBESTJC ANSWERS TO THE BIOLOGY QUESTIONS (1) A (2) C (3) D (4) C (5) A (6) A (7) D (8 ) A (9) D (10) C (11) A

centurionpapa:

1A. 2C 3A 4 C 5A 6C 7D 8A 9 A 10B
11D
Is it all correct first before I start rambling

afoobabs:


hi everyone.
its been a long time in here

Eben331:
DrBESTJC, u dnt answer questions nowadays, why?? You just dey view without commenting. Help me with my question.

Eben331:
A Physics student standing on the edge of a cliff throws a stone vertically downward with an initial speed of 10m/s. The instant before the stone hits the ground below, it is travelling at a speed of 30m/s. If the physics student were to throw the rock horizontally outward from the cliff instead, with the same initial speed of 10m/s, what is the magnitude of the stone just before it hits the ground? (a) 10m/s (b) 20m/s (c) 30m/s (d) 40m/s. PLS SHOW UR WORKINGS!!

Eben331:
Thanks... I understand now but question 17 ans is nt among the options.

Eben331:
@DrBESTJC, pls show the workings to questions 17 and 20 of ur physics questions.

DrBESTJC:
Quick Revision Questions in PHYSICS

17) a radioisotope has a decay constant of 10^-7second^-1 . The average life of the radioisotope is...?
A) 1.00 x 10⁷ seconds
B) 6.93 x 10⁸ seconds
C) 1.00 x 10^-7 seconds
D) 6.93 x 10⁷ seconds


20) Given three capacitors 0.3uF , 0.5uF, and 0.2uF, the joint capacitance when arranged to give minimum capacitance is...?
A) 0.1 uF
B) 0.3 uF
C) 1.0 uF
D) 0.5 uF

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 hate him for his extreme CONSERVATIVE views (Antonym) (a) radical (b) conventional (c) fanatical (d) heretical (4) Well, the boy is GAY and social (Synonym) (a) effeminate (b) lively (c) reserved (d) straight (5) It's certain we shall pass the exam, __? (a) shan't we (b) shall we (c) isn't it (d) shouldn't we PLS EXPLANATIONS WILL BE NEEDED!

Eben331:
(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.

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!

DrBESTJC:
The correct answers are marked with *

Quick Revision Questions in PHYSICS

Answer all 25 questions in 20 minutes !

Test of Speed and Accuracy

Typical UI PostUTME Questions

Exam is already here !

1) Water does not drop through an open umbrella of silk material unless the inside of the umbrella is touched. This is due to...?
A) capillarity
B) osmotic pressure
C) viscosity
D) surface tension *

2) A force of 100N is used to kick a football of mass 0.8Kg. Find the velocity with which the ball moves if it takes 0.8 seconds to be kicked.
A) 32 m/s
B) 50 m/s
C) 64 m/s
D) 100 m/s *

3) A piece of stone attached to one end of a string is whirled round in a horizontal circle and the string suddenly cuts. The stone will fly off in a direction :
A) perpendicular to the circular path
B) parallel to the circular path
C) tangential to the circular path *
D) towards the center of the circle

4) Which one of the following is not used in the formation of a pure spectrum...?
A) convex lens
B) plane mirror *
C) triangular prism
D) narrow slit
E) screen

5) A 90cm uniform lever has a load of 30N suspended at 15cm from one of its ends. If the fulcrum is at the center of gravity,the force that must be applied at its other end to keep it in horizontal equilibrium is...?
A) 15N
B) 20N *
C) 30N
D) 60N

6) By what factor will the size of an object placed 10cm from a convex lens be increased if the image is seen on a screen placed 25cm from the lens...?
A) 15.0
B) 2.5 *
C) 1.5
D) 0.4

7) If an object is placed between two parallel plane mirrors with their reflecting surfaces facing each other, how many images of the object will be formed...?
A) Infinite *
B) Eight
C) Four
D) Two

8 ) At what position will an object be placed in front of a concave mirror in order to obtain an image at infinity...?
A) at the pole of the mirror
B) at the principle focus *
C) at the center of curvature
D) between the principal focus and the center of curvature

9) The operation of an optical fibre is based on the principle of...?
A) dispersion of light
B) interference of light
C) refraction of light *
D) polarization of light

10) A wire of 5 ohm resistance is drawn out so that its new lenght is two times the original lenght. If the resistivity of the wire remains the same and the cross-sectional area is halved,the new resistance is...?
A) 40 ohm
B) 20 ohm *
C) 10 ohm
D) 5 ohm

11) Which of the following pairs of light rays shows the widest separation in the spectrum of white light...?
A) Blue and Red *
B) Green and yellow
C) Indigo and violet
D) Orange and Red

12) The most suitable cell used for short interval switches in electric bells is a...?
A) Lead-acid accumulator
B) Daniel cell
C) Leclanche cell *
D) Nickel iron accumulator.

13) The count rate of a radioactive material is 800 count/min. If the half-life of the material is 4days,what would the count rate be 16 days later ?
A) 200 count/min
B) 100 count/min
C) 50 count/min *
D) 25 count/min

14) The major difference between a pure semiconductor and a pure metal is that :
A) metals are harder than semiconductors
B) while the resistance of metals decreases with temperature,the reverse is the case for semiconductors
C) the resistance of metals increases with temperature,while for semiconductors,it is the reverse *
D) metals have forbidden gaps while semiconductors have not.

15) When a nucleus is formed by bringing protons and neutrons together,the actual mass of the formed nucleus is less than the sum of the masses of the constituent protons and neutrons. The energy equivalent of this mass difference is the...?
A) lost energy
B) work function
C) binding energy *
D) stability energy

16) A generator-manufacturing company was contracted to produce an a.c. dynamo but inadvertently produced a d.c. dynamo. To correct this error,the:
A) armature coil should be made of silver
B) commutator should be replaced with slip rings *
C) commutator should be replaced with split rings
D) armature coil should be made of aluminium

17) a radioisotope has a decay constant of 10^-7second^-1 . The average life of the radioisotope is...?
A) 1.00 x 10⁷ seconds
B) 6.93 x 10⁸ seconds *
C) 1.00 x 10^-7 seconds
D) 6.93 x 10⁷ seconds

18 ) In a reverse biased junction diode,current flows in by
A) positive holes alone
B) majority carriers
C) electrons alone
D) minority carriers *

19) The instrument used for securing a large number of similar charges by induction is called
A) electrophorus *
B) capacitor
C) proof-plane
D) electroscope

20) Given three capacitors 0.3uF , 0.5uF, and 0.2uF, the joint capacitance when arranged to give minimum capacitance is...?
A) 0.1 uF *
B) 0.3 uF
C) 1.0 uF
D) 0.5 uF

21) The difference between x-rays and gamma rays is that
A) x-rays are more penetrating than gamma rays
B) x-rays are electromagnetic radiations while gamma rays are negatively charged radiations
C) x-rays have higher frequencies than gamma rays
D) x-rays arise from energy changes in the electronic structure of atoms while gamma rays come from the nucleus. *

22) A cell whose internal resistance is 0.5 ohms delivers a current of 4A to an external resistor. The lost voltage of the cell is
A) 1.250V
B) 2.000V *
C) 8.000V
D) 0.125V

23) If the angle between two vectors P and Q is zero degrees, the vectors are said to
A) intersect at angle 45 degrees
B) intersect at angle 60 degrees
C) be parallel *
D) be perpendicular.

24) A body of mass 4Kg is acted upon by a constant force of 12N for 3 seconds.The kinetic energy gained by the body at the end of the time is
A) 144J
B) 162J *
C) 81J
D) 72J

25) A machine whose efficiency is 60% has a velocity ratio of 5. If a force of 500N is applied to lift a load P, what is the magnitude of P ?
A) 1500N *
B) 500N
C) 4166N
D) 750N

Eben331:
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.

Eben331:
The correct answers are marked with *

Eben331:
(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

Aceed:



A 15.0kg of monkey hangs from a cord
suspended from the ceiling of an elevator.
The cord can withstand a tension of 200N
and breaks as the elevator accelerates.
What was the elevator's minimum accleration
(in magnitude and direction)? g = 10ms^-2