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Brain Teaser: Which Glass Will Be Filled First And Why? - Forum Games (6) - Nairaland

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Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Gokoyer0(m): 5:49pm On Jan 05, 2021
I hope we all agree that all the cups don't have lid/cover.
So, in the two smaller cups mount on each other between cup 1 and 2, overflowing will occur and take longer time before it will forced/pressurised the cup on top to start shelving the liquid into cup 2. This is not the case for cup in between cup 3 and 4. Despite the overflowing that will occur in the mounted cups btw 1 and 2, the cup between 3 and 4 looks to have the same or even smaller capacity in comparison with the former before it will start shelving it's content into 4.

Hope it makes sense.
TheCalculator:

Looking at how small the first glass is, unlike the other on the right which is wider and lower too

1 Like

Re: Brain Teaser: Which Glass Will Be Filled First And Why? by saintruky(m): 5:50pm On Jan 05, 2021
4
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Nobody: 6:26pm On Jan 05, 2021
Loris576:

i don't seem to understand you well
but from my own humble opinion, the cup before entering cup 2 is small, whereas the other is larger. So looking at it critically you'll see it's 2 that will be filled first.

I am open to ideas �
You're very correct.
The volume is one measured to be considered.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by AkuFather(m): 7:07pm On Jan 05, 2021
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Nobody: 7:11pm On Jan 05, 2021
CharleyBright:
None.
The Cork on the bottle is still intact.
It will require to be uncorked before contents of the bottle is distributed.
Omo you like Cork too much why.

Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Frankmore96: 7:45pm On Jan 05, 2021
Glass 4 Will Full First, Followed by Glass 2, Then Glass 3 and Lastly, Glass 1. Check The The Levels of The Host Very Well, You Will Understand.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Nobody: 7:47pm On Jan 05, 2021
Agwaso:


Both of you are correct from the perspective you are looking at it. The question is not complete because as we do not know ratio of the sizes of the jug above.

The jug for cup 2 is smaller but at higher altitude, while the jug for cup 4 is bigger and wider but at a lower altitude. We need to have the diffent heights and the sizes to determine this.
But this question relates to fluid mechanics.
by inspection the jug for cup 2 has higher altitude so fluid tend to flow at a fast rate due to the increase in pressure at high altitude.
The size of cup 2 is also smaller compared to cup 4 so fluid is faster at small size compared to bigger sizes.
Am open for any of your reasons.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Nobody: 7:58pm On Jan 05, 2021
presleYzzi:



You're smart
But the flow rate of the fluid depends on the altitude because there's high pressure on high altitude compared to low altitude.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Nobody: 8:02pm On Jan 05, 2021
pyrex23:
what is the formula for pressure? The higher, the more the pressure
Exactly, the higher the altitude the more the pressure, fluid tend to flow at a higher altitude with increased pressure.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Nobody: 8:13pm On Jan 05, 2021
InvertedHammer:
/
Height. Volume. Pressure differential.

Cup 2

/
You know what you're doing.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 8:42pm On Jan 05, 2021
Loris576:

i don't seem to understand you well
but from my own humble opinion, the cup before entering cup 2 is small, whereas the other is larger. So looking at it critically you'll see it's 2 that will be filled first.

I am open to ideas �
Okay, lets create a mental picture. when you start pouring the the wine, the wine will be at the same level everywhere. what that means is that in all the pipes and cups it enters, it will still be on the same level. but when there is an opening (a pipe) the level of the wine will stop increasing everywhere until the container where that opening leads to has come to the same level as the others. then they will all start increasing together.
from what i just said now, when cup 4 is getting full, the level of the wine will stop rising in that small container between 1 and 2, till 4 is full, then it will continue rising.
so the answer is cup 4 then 3, 2 and lastly 1.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 8:49pm On Jan 05, 2021
pyrex23:
what is the formula for pressure? The higher, the more the pressure
in the case of this problem, the pressure we are considering is atmospheric pressure. and atmospheric pressure increases with depth. that means the lower a point in the system, the higher the pressure at that point.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 8:51pm On Jan 05, 2021
the volumes of the containers have nothing to do with anything
onyechez:

You're very correct.
The volume is one measured to be considered.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 8:54pm On Jan 05, 2021
senchibi:

Just by saying you don't understand him well means you're an arts student. But I think 2 will get filled up first.

There is a saying;
if the lion says to the goat, "no matter what, the lion does not eat grass", the goat should say to the lion, "no matter what, the goat does not eat flesh".
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 8:56pm On Jan 05, 2021
Agwaso:


Both of you are correct from the perspective you are looking at it. The question is not complete because as we do not know ratio of the sizes of the jug above.

The jug for cup 2 is smaller but at higher altitude, while the jug for cup 4 is bigger and wider but at a lower altitude. We need to have the diffent heights and the sizes to determine this.

Not necessarily. everything needed to solve the problem is given.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 8:57pm On Jan 05, 2021
olatechnician:
the glass in between 1 and 2
No. cup 4 will get full even before that.

1 Like

Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 9:01pm On Jan 05, 2021
onyechez:

At the left hand side the elevation is higher than the right hand side of the set up so there's more pressure on that side than right hand side of glass 4
Secondly: glass 2 on the side of higher elevation has a small volume so it will take less time to fill than glass 4.
The answer is : 2
Huh! No o. first, atmospheric pressure increases with depth, p=-rgh (the negative there shows negative height, thats dept). secondly, the problem has nothing to do with the volumes of those intermediary containers.

in the formular above;
p = pressure
r = density of fluid
g = gravity
h = height (and is negative)
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 9:04pm On Jan 05, 2021
abc115:

conduits are the same
Exactly. its a steady flow process at the intermediary containers. rate of Input = rate of output
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 9:06pm On Jan 05, 2021
ClassicMan202:


I know, I am talking about the rate at which it flows from the bottle.
that doesnt affect anything. Only that in a real situation most of the wine would spill and only very little would go through the first conduits.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 9:08pm On Jan 05, 2021
kingchris30:
it is neither 2 nor 4, the cup that will fill first actually has no number on it
No. 4 will fill before it.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 9:12pm On Jan 05, 2021
rufai1440:
no from physics surface area of the cup above 4 will attract more pressure that will allow no 4 first for no 2 the capillary btw d cups above will sluggish the pressure for it so it will be 4321.
LOL.
i like your analogy, but the surface area of a container doesnt affect the fluid pressure at a point.
you should be familiar with the formula p=-rgh
i agree with your answer though, 4321.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 9:15pm On Jan 05, 2021
CALCULUS16:


2 would be fill first, pressure depend on height, look at the case of 2, the vessel that collect the water is small when compared to that of 4, hence the faster the vessel would reach the conduit going to glass 2, and being that the vessel connected to 2 is higher than the rest, atmospheric pressure and potential energy of the water above the orifice linking to glass 2 would hasten it to become full very quicker than the rest.

Look at how big the vessel linking glass 3 and 4, look at how small the vessel linking glass 1 and 2, before the fluid reaches the orifice of 3 and 4 ,the fluid in vessel linking 1 and 2 would have reached the orifice linking glass 2
it has nothing to do with the volumes of those containers
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 9:17pm On Jan 05, 2021
johnero353:
Anyway, If I can know the volume of the glasses, as well as the volume flow rate; I'll precisely know the one that will get filled first...

Hope that's sensible
nah! that would be redundant information - those are not needed
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 9:19pm On Jan 05, 2021
ChiefJusticeFuc:


Wrong.

For Glass 4 to be filled , the recepticle must maintain a much higher volume than that serving 2.

Lol
volume has nothing to do here
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Jimhickey: 9:21pm On Jan 05, 2021
has nothing to do with the sizes
b5ive:
Did u notice the jar leading to the 4th glass is bigger, glass2 will get filled b4 glass 4 definitely.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Donjuan77: 9:27pm On Jan 05, 2021
2 , and dats d end
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by adelove4real200: 10:51pm On Jan 05, 2021
Glass 4 will be filled first.
According to physics, the lower the height, the higher the pressure. Glass that is filling glass four has a lower opening thus making the water to gush out more from the side with glass 4.
Glass 1 & 2 have intermediate cup between them. It slows down the rate at which water will enter glass 1 & 2. Besides this, the opening of filler to glass 1 & 2 are more higher. Majority choosing 1&2 are wrong.
If u want to experiment this, get a tin of raid insecticide cut it's cap and fill it with water. Puncture 3 holes there vertically from top to down. You will discover the lowest hole will bring out more water compare to hole 1 & 2. The lower the height, the higher the pressure. The point with higher pressure deliver more water.
Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Nobody: 11:25pm On Jan 05, 2021
Jimhickey:

Huh! No o. first, atmospheric pressure increases with depth, p=-rgh (the negative there shows negative height, thats dept). secondly, the problem has nothing to do with the volumes of those intermediary containers.

in the formular above;
p = pressure
r = density of fluid
g = gravity
h = height (and is negative)
See the answer.
grin grin grin grin grin grin

Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Nobody: 11:30pm On Jan 05, 2021
For those struggling to get the answer.
grin grin grin grin grin
The answer is

Re: Brain Teaser: Which Glass Will Be Filled First And Why? by Nobody: 11:41pm On Jan 05, 2021
Jimhickey:
the volumes of the containers have nothing to do with anything
See the answer

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