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Nairaland Forum / Nairaland / General / Education / UTME 2017: Thread For Science Jambites (91420 Views)
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Re: UTME 2017: Thread For Science Jambites by ColdSweat(m): 8:30am On Mar 28, 2017 |
Optimist1998:Insecta is the most appropriate answer. |
Re: UTME 2017: Thread For Science Jambites by Theebz: 8:33am On Mar 28, 2017 |
castrokiller: Juat the Percentage Cutoff would ne Nice please |
Re: UTME 2017: Thread For Science Jambites by Nobody: 10:16am On Mar 28, 2017 |
Physics -The resultant force of a couple is ………? A. Infinity B. Zero C. One D. Half - Capacitors are used in the induction coil to A. control circuits B. prevent distortion of electric fields C. prevent electric sparks D. dissipate energy - If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT? A. 4:01 B. 1:04 C. 5:01 D. 2:01 -If a projectile has maximum range of 36m, find the speed of projection (Take g = 9.8m/s 2 ) A. 27m/s 2 B. 2m/s 2 C. 4m/s 2 D. 7m/s 2 Same rule; explain your answers Edit: The question in bold ![]() |
Re: UTME 2017: Thread For Science Jambites by Nobody: 10:20am On Mar 28, 2017 |
Optimist1998:Still unanswered |
Re: UTME 2017: Thread For Science Jambites by castrokiller(m): 7:07pm On Mar 28, 2017 |
[/color] Optimist1998:**(sum of moments created by a force that is if two forces were applied to turn a fan are equal in magnitude but opposite in direction their sum is zero) C. One D. Half - Capacitors are used in the induction coil to A. control circuits B. prevent distortion of electric fields C. prevent electric sparks** (just guessing) D. dissipate energy - If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT? A. 4:01 B. 1:04 C. 5:01 D. 2:01 -If a projectile has maximum range of 36m, find the speed of projection (Take g = 9.8m/s 2 ) A. 27m/s 2 B. 2m/s 2 C. 4m/s 2 D. 7m/s 2 Same rule; explain your answers Edit: The question in bold ![]() |
Re: UTME 2017: Thread For Science Jambites by castrokiller(m): 7:09pm On Mar 28, 2017 |
Optimist1998:please answer now..... |
Re: UTME 2017: Thread For Science Jambites by Nuel25846(m): 8:17pm On Mar 28, 2017 |
Where is Donpre?? I like the guy...he is a genius. |
Re: UTME 2017: Thread For Science Jambites by Nuel25846(m): 8:21pm On Mar 28, 2017 |
If the mechanical advantage of a
machine is 4. What is its ratio for LOAD
to EFFORT?
A. 4:01
B. 1:04
C. 5:01 D. 2:01
The answer is A.4.01....MA=Load/Effort. |
Re: UTME 2017: Thread For Science Jambites by Nobody: 8:33pm On Mar 28, 2017 |
Optimist1998:This is a question on relative density (we're comparing the densities of two things) Given parameters. volume submerged in water =50% " " " glycerine =40% Density of water =1000kgm3 (the density of water is almost never given) Density of glycerine. =x There are two ways of comparing densities..... First formula: volume submerged in water/volume submerged in glycerine Second formula: Density of glycerine/density of water Like most things in physics, simply equate the two equations 50/40=x/1000 x=50*1000/40 x=1250kgm3 Here we have it.....option B +I. Density of the liquid.Pressure in fluids= Vpg v=volume p=density g= g as we know it. So III and IV will not affect pressure in fluids |
Re: UTME 2017: Thread For Science Jambites by Nobody: 8:35pm On Mar 28, 2017 |
Nuel25846:Correct |
Re: UTME 2017: Thread For Science Jambites by Nobody: 8:38pm On Mar 28, 2017 |
Nuel25846:Probably studying |
Re: UTME 2017: Thread For Science Jambites by Nobody: 9:06pm On Mar 28, 2017 |
castrokiller:Your answers are both correct |
Re: UTME 2017: Thread For Science Jambites by Nuel25846(m): 9:15pm On Mar 28, 2017 |
Optimist1998.
The fig above shows three different ways
of hanging a heavy picture from a hook.
the tension in the string will be A. Greatest in X
B. Greatest in Y
C. Greatest in Z
D. Same in each one.....the answer should be C. |
Re: UTME 2017: Thread For Science Jambites by Donpre(m): 9:23pm On Mar 28, 2017 |
Xup pals, I was expecting to meet questions. kinda disappointed As for my absence, I was busying entering queues after queues unto jamb reg wahala. Still didn't do my reg @"he is a genius" you kidding ryt?. I'm averagely intelligent jor |
Re: UTME 2017: Thread For Science Jambites by Donpre(m): 9:26pm On Mar 28, 2017 |
Nuel25846:"E. The collisions of molecules with each other are inelastic" You should pay attention to details. it clearly stated collision with each other. The question is correct, just the "inelastic" typo |
Re: UTME 2017: Thread For Science Jambites by Nobody: 9:38pm On Mar 28, 2017 |
Nuel25846:Try to imagine this; you're holding a rope like the one below with both hands ![]() >>Hold the rope with your arms straight up or >>Spread your arms (piture attached) Ps: by comfortable I mean less strain/pain on your muscles/hand
|
Re: UTME 2017: Thread For Science Jambites by Donpre(m): 9:41pm On Mar 28, 2017 |
Optimist1998:B - Capacitors are used in the induction coil toI'd go with D - If the mechanical advantage of a machine is 4. What is its ratio for LOAD to EFFORT?Most Def A -If a projectile has maximum range of 36m, find the speed of projection (Take g = 9.8m/s 2 )I'm assuming there isn't an angle. using the formula for range, there wasn't a correct option but using the formula for maximum height, A would be correct Are you sure the question is correct?... and the S.I unit of the answers is also wrong |
Re: UTME 2017: Thread For Science Jambites by Nobody: 9:55pm On Mar 28, 2017 |
Donpre:I didn't even notice the SI unit ![]() As for the question, I'll let it slide as a typo...... |
Re: UTME 2017: Thread For Science Jambites by Nobody: 10:12pm On Mar 28, 2017 |
Donpre:I just recently discovered that the collision of molecules with each other is not perfectly elastic as some energy is transferred to the next molecule causing that molecule to move (Kinetic energy). Sadly our textbooks didn't stress this point........... 1 Like |
Re: UTME 2017: Thread For Science Jambites by Donpre(m): 10:18pm On Mar 28, 2017 |
Optimist1998:ermmm... I thought all molecules in gaseous state are already in continual motion due to kinetic energy already acquired it could be plausible that molecules that collided with the container lose their kinetic energy and have to regain it from another molecule |
Re: UTME 2017: Thread For Science Jambites by Nobody: 10:49pm On Mar 28, 2017 |
Donpre:you can have a perfectly elastic collision in gaseous molecules when -all molecules posses the same amount of energy individually or discretely so nothing increases or decreases in terms of energy. This is not always the case as the energy of these molecules are affected by external factors. Due to these factors, some molecules possess somewhat higher amount of energy ( although very negligible) when compared to others. When they collide kinetic energy may decrease or increase. Somehow I feel the Kinetic theory has more to do with 'ideal gas' in other words "noble gases". |
Re: UTME 2017: Thread For Science Jambites by Nuel25846(m): 8:28am On Mar 29, 2017 |
Optimist1998:I kinda used the parallelogram law of vector. |
Re: UTME 2017: Thread For Science Jambites by Nuel25846(m): 8:45am On Mar 29, 2017 |
![]() |
Re: UTME 2017: Thread For Science Jambites by Nobody: 9:14am On Mar 29, 2017 |
Nuel25846:parallelogram law....That's even better. I wanted to create a mental picture before applying laws. From the rope analogy, you'll definitely feel "more" pain when your arms are wide apart. Why? You're spreading your arms at an angle. But when your arms are straight up, just your weight is pulling you down. Now this cancels out option C. What's next? Now that we know the answer is between A and B. You can now apply any law you wish to apply to find out which case has the highest tension. Either ways Tension would be greatest in Y...option B |
Re: UTME 2017: Thread For Science Jambites by Nuel25846(m): 9:17am On Mar 29, 2017 |
Optimist1998:Yeah, true.....pls more questions. |
Re: UTME 2017: Thread For Science Jambites by Nobody: 9:30am On Mar 29, 2017 |
Nuel25846:Ok, but that'll be later I'm a bit busy now. |
Re: UTME 2017: Thread For Science Jambites by Nuel25846(m): 10:04am On Mar 29, 2017 |
mainwhile
|
Re: UTME 2017: Thread For Science Jambites by Nobody: 10:37am On Mar 29, 2017 |
![]() Pressue In the fig above if the atmospheric pressure is 760mm, the pressure of the chamber G is A. 660mm B. 690mm C. 830mm D. 860mm Tension A 1000kg elevator is descending vertically with an acceleration of 1.0ms -2 , if the acceleration due to gravity is 10ms -2 , the tension in the suspending cable is A. 1.0N B. 10.0N C. 9000.0N D. 11 000N Still Pressure A rectangular tank contains water to a depth of 2m, if the base is 4m x 3m, calculate the force on the base (Density of water = 10 3 kgm -3 , g = 10ms -2 ) A. 1.4 x 10 2 N B. 24 x 10 4 N C. 2.0 x 10 4 N D. 1.7 x 10 3 N |
Re: UTME 2017: Thread For Science Jambites by Nobody: 11:03am On Mar 29, 2017 |
Which of the following is true of sounds? A. sound travels faster in air at 20 o C than at 30 o C B. the frequency of a given sound wave changes when it crosses the boundary seperating two media C. the wavelength of a given sound wave in air decreases as the temperature increases D. sound waves cannot be reflected Please lets discuss this...... Why is C the answer, I don't agree with any of the options above. Maybe I'm missing something. |
Re: UTME 2017: Thread For Science Jambites by Nuel25846(m): 7:37pm On Mar 29, 2017 |
Tension A 1000kg elevator is descending vertically
with an acceleration of 1.0ms -2 , if the
acceleration due to gravity is 10ms -2 ,
the tension in the suspending cable is
A. 1.0N
B. 10.0N C. 9000.0N
D. 11 000N
1000kg*1.0ms+1000kg*10ms=11000N ans D |
Re: UTME 2017: Thread For Science Jambites by Donpre(m): 8:54pm On Mar 29, 2017 |
Optimist1998:I think there isn't a correct option too @Option C, Since velocity increases as temperature increases, and frequency remains constant, then wavelength should also increase and not decrease... could be a typo or a mistake. I'll Google search just to be sure 1 Like |
Re: UTME 2017: Thread For Science Jambites by Donpre(m): 8:56pm On Mar 29, 2017 |
Nuel25846:which formula did you use? |
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