₦airaland Forum

@optimist1998... you've registered ryt? which school did you finally go for?

Isaolamide:
It is deliquescent but series picked hygroscopic and a
I am confused
Generally because all deliquescent are hygroscopic but not all hygroscopic are deliquescent

its hygroscopic cus its still solid and didn't turn to liquid

Optimist1998:
Phyiscs:
The time rate of change of momentum is
A. impulse
B. force
C. power
D. pressure

A force of 100N was used to kick a football of mass 0.8kg. Find the velocity with which the ball moves if it takes 0.8s to be kicked
A. 32ms¹
B. 10ms²
C. 64ms¹
D. 100ms¹

B and D

itzeminent:
d guy that did my jamb profile make d mistake... I wrote data for him and went to tutorial, I didn't login to cross check and I went to do my jamb registration, after gotten d slip I realized d error

relax!... read and pass your exams. Jamb allows change of name/DOB/Course/institution. Only subject combo can't be changed!

Jamb just announced on Twitter that the mock has been officially postponed and apologies for the inconveniences...

well, its obvious the mock is a bust, the main exam better come out right.

Nuel25846:
Enssential physic and chem text books.

Essential physics? that gibberish crap!... you dey try, its not easy

Nuel25846:
My own physic book is worse,like it was written by a road side mechanic....my chemistry was written by a traditional herb seller

Hahaha... I was referring to the formula in the pic tho; "BANI" asin "banny"


BTW, which text do you use?

A little humour
When your village people uses your textbook to distract you

Godspeed to those writing the mock... I'll be waiting to hear your experiences

Optimist1998:
The highlighted ans is wrong

Adding 3 to fluorine was also wrong... I'd have gone for fluorine but then I saw 3 there and went for Lithium which was a closer bet

Optimist1998:
Chemistry:
How long would it take to deposit 0.08g of copper from CuCl2 solution by passing a current of 0.5A?
[Cu = 64, F = 96500 C mol-1]
A. 6 mins
B. 8 mins
C. 24 mins
D. 48 mins

B

Mg2+(aq) + 2e->(aq) → Mg(s)E°(volts) = -2.370
Zn2+(aq) + 2e->(aq) → Zn(s)E°(volts) = -0.763
Cds2+(aq) + 2e->(aq) → Cd(s)E°(volts) = 0.403
Cu2+(aq) + 2e->(aq) → Cu(s)E°(volts) = 0.340

In the electrochemical series above, the strongest reducing agents is?
A. Cu (s)
B. Cd(s)
C. Zn(s)
D. Mg(s)

D

What is the mass number of an element having 20 neutrons, 15 protons and 15 electrons?

35

A real image of an object fom1ed by a converging lens of focal length 15cm is three times the size of the object. What is the distance of the object from the lens?
A. 30cm
B. 25cm
C. 20cm
D. 15cm
E. 10cm

Not quite sure but I'd go with C

Which of the following ions is isoelectronic with neon? [3 Li, 3F, 10 Ne, 17 CI, 19 K]
A. CI -
B. F -
C. K +
D. Li,+

D

Optimist1998:
Physics
https://myschool.com.ng/classroom/photos/lthumbs/13127795721_19920002.jpg
In the diagram above, the hanging mass m2 is adjusted until m1 is on the verge of sliding. The coefficient of static friction between the mass m1 and the table is
A. m1/m2
B. m1g/m2
C. m2/m1
D. m2g/m1

C
coefficient = F/R
Cus F = M²g
Normal Reaction = M¹g
U = M²g/M¹g
U = M²/ M¹

Optimist1998:
Current electricity (II)

already found it... thanks

Optimist1998:
Why A........ and Donpre why C?

Too long to explain... what's the answer anyway

The metre bridge is 100cm long
If you place one of the resistors at one end x
The other resistor will be at 100-x

Topic please

Nuel25846:
optimist1998 and Donpre am I wrong abt that sound wave

seriously I think wavelength should increase... but on myschool many are arguing that 'decrease' would be correct https://myschool.com.ng/school/classroom/physics/q=17-pg=1

Optimist1998:
D
My ridiculous reason:
Soil type, topography and Amount of rainfall/light determines the type of organisms you'll find in a region.
Sokoto has a minute amount of rainfall and a unique topography, hence, a completely different community of organisms.

keyword "primarily"

primarily it should determine the nature of soil which would in turn determine the community... that's how I see it tho

Optimist1998:

[b]Physics
If a positively charged glass-rod is used to charge an electroscope X by contact and an electroscope Y by induction, then
A. X and Y will be negatively charge
B. X and Y will be positively charged
C. X will be negatively charged and Y positively charged
D. X will be positively charged and Y negatively charged
E. X will be positively charged and Y will remain uncharged

C.. I think

In a meter bridge experiment, two resistor 2ΩΩ and 3ΩΩ occupy the left and right gaps respectively. Find the balance point from the left side of the bridge

I don't even know what to do here

Chem 1. A 2. E

Optimist1998:
Donpre she's correct right?

I dunno the answer myself... Textbook says some fishes are ovoviparious, internet says there are some Ovoviparious amphibians. I was hoping you guys would chip in something.

I'm going with Mr Fish too.. pastQue says Amphibians

vicstiqs95:
pls can i buy the jamb E-pin and register a day after? hope it wont expire

it won't.. I registered 2 days after getting my pin

If a sound wave goes from a cold air region to a hot air region, its wavelength will

A. increase
B. decrease
C. decrease then increase
D. remain constant

Give reason

Are the biology questions at the top of the page invisible?... why is no one answering them?

SamanN:
Donpre, do you understand the concept behind progressive waves equation now?

Yeah! its clearer now.

Optimist1998:
This forms the basis of any progressive wave equation
Asin2π/√(vt-x)
From here you can derive anything the question demands.

Temilola21:
I cant take d snapshot so i'll represent wavelength with Q and pi with M

Thanks y'all... Really, I'm grateful!

Another....
When a simple harmonic wave is propagated through a medium, the displacement of a particle (in cm) at any instant of time is given by
y = 10 sin 2π /100 (3600 t – 20)
Calculate, the amplitude of vibrating particle, wave velocity, wavelength, frequency and time period.

Please simplify and snapshot!

emeraldgist:
D

Explain... why not nature of soil?

Q.8.... Give reason

The physical and climatic factors of a region primarily determine the?

A. kinds of animals inhabiting the area
B. types of plants found in the area
C. nature of the soil in the region
D. community of organisms in the region

Optimist1998:
Have you tried using secondary school physics by PN Okeke.......

yes I have... it didn't help

someone should answer this... snapshot your work if possible

Given the progressive wave equation y = 5 sin (200?t - 0.4x), calculate the wavelength

a. 12.4m b. 15.7m c. 17.5m d. 18.6m

I'm having a problem deducing wavelength, period, frequency etc. from a progressive wave equation... would love if anyone can point me to link or put me through.

Optimist1998:
.

Thanks

Optimist1998:
Conditions for equilibrium of concentration of reactant and products will be same if
A. temperature is constant
B. pressure or volume is constant
C. concentration of products and reactants are same
D. all of above

What's the answer to this question?... a little explanation wouldn't hurt