trick of the day [modified]
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I got this trick question today from a friend of mine. I am trying to solve it. i solve 50 percent of the question solved. Note if you have a lot of work don't continue reading cause it will take some time to be solved. The trick question is: You have infront of you 12 eggs. All have the same color the same shape and the same size (you can not diffrentiate between one and the other by just looking at it). 11 of those 12 eggs have the same weight and one differs (either less or more). The question is to find which one of those 12 is the different one. You have a balance and you can use it only 3 times. I will remind you in one important thing that we don't know if the one egg which is different from the others weighs more or less than any of the other 11 eggs. good luck :) if you think you got the solution send your answer to my mail address jamilabkh@gmail.com to leave some time for others to think about it don't post your answers;)
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why take the balance, drop them from a high altitude all at once, the one that falls sooner or later is the egg :-)
V. I found a living worth working for, but haven't found work worth living for.
Duh... that won't work. Galileo proved it way back in God-knows-which century. A 100 kg iron ball will fall at the same rate as a 1 kg ball from the same height.
Cheers, Vikram.
"Life isn't fair, and the world is full of unscrupulous characters. There are things worth fighting for, killing for and dying for, but it's a really small list. Chalk it up to experience, let it go, and move on to the next positive experience in your life." - Christopher Duncan.
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Duh... that won't work. Galileo proved it way back in God-knows-which century. A 100 kg iron ball will fall at the same rate as a 1 kg ball from the same height.
Cheers, Vikram.
"Life isn't fair, and the world is full of unscrupulous characters. There are things worth fighting for, killing for and dying for, but it's a really small list. Chalk it up to experience, let it go, and move on to the next positive experience in your life." - Christopher Duncan.
it will if you have no vacuum...
V.
Stop smoking so you can: Enjoy longer the money you save. Moviereview Archive -
it will if you have no vacuum...
V.
Stop smoking so you can: Enjoy longer the money you save. Moviereview ArchiveUnless I'm very mistaken, bodies fall at the same rate towards the Earth (or any other body) at the same rate. The ideal condition is vacuum, but if there is air/wind, it offers significant resistance; which explains why a block of wood falls faster than a feather. I still stand by what I said; I don't understand the point you're trying to make. :~
Cheers, Vikram.
"Life isn't fair, and the world is full of unscrupulous characters. There are things worth fighting for, killing for and dying for, but it's a really small list. Chalk it up to experience, let it go, and move on to the next positive experience in your life." - Christopher Duncan.
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Unless I'm very mistaken, bodies fall at the same rate towards the Earth (or any other body) at the same rate. The ideal condition is vacuum, but if there is air/wind, it offers significant resistance; which explains why a block of wood falls faster than a feather. I still stand by what I said; I don't understand the point you're trying to make. :~
Cheers, Vikram.
"Life isn't fair, and the world is full of unscrupulous characters. There are things worth fighting for, killing for and dying for, but it's a really small list. Chalk it up to experience, let it go, and move on to the next positive experience in your life." - Christopher Duncan.
Vikram A Punathambekar wrote:
Unless I'm very mistaken, bodies fall at the same rate towards the Earth (or any other body) at the same rate.
The department of irrelevant nitpicking would like to point out that while the Earth attracts a BB and a boulder equally the boulder applies a stronger force on the Earth. As a result in a vacuum the boulder will appear to fall faster as observed by someone on the Earth's surface by an infinitesimal rate. You'd need to drop something the size of a large moon to see any visible difference. :rolleyes:
-- Rules of thumb should not be taken for the whole hand.
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Duh... that won't work. Galileo proved it way back in God-knows-which century. A 100 kg iron ball will fall at the same rate as a 1 kg ball from the same height.
Cheers, Vikram.
"Life isn't fair, and the world is full of unscrupulous characters. There are things worth fighting for, killing for and dying for, but it's a really small list. Chalk it up to experience, let it go, and move on to the next positive experience in your life." - Christopher Duncan.
So you mean if I have two object with the same volume, one is a 200KG iron balloon and another inflated with helium, they will fall at the same speed with a acceleration of 9.8 m/s² towards earth?? :-D Lets give a try and drop the two from a second floor, I'll be waiting for the helium balloon to catch it and you will be waiting for the iron balloon. :laugh::) Lets make sure an ambulance is on site.
-- If you think the chess rules are not fair, first beat Anand, Kasparov and Karpov then you can change them. Moral is, don't question the work of others if you don't know the reason why they did it.
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I got this trick question today from a friend of mine. I am trying to solve it. i solve 50 percent of the question solved. Note if you have a lot of work don't continue reading cause it will take some time to be solved. The trick question is: You have infront of you 12 eggs. All have the same color the same shape and the same size (you can not diffrentiate between one and the other by just looking at it). 11 of those 12 eggs have the same weight and one differs (either less or more). The question is to find which one of those 12 is the different one. You have a balance and you can use it only 3 times. I will remind you in one important thing that we don't know if the one egg which is different from the others weighs more or less than any of the other 11 eggs. good luck :) if you think you got the solution send your answer to my mail address jamilabkh@gmail.com to leave some time for others to think about it don't post your answers;)
Drop the eggs from the empire state building on a calm day. Measure the time that take each egg to fall. Compare the two shortest and longest times, the longest times difference will give the unique egg, if the longer difference is form the two first eggs in the list then that egg is heavier, if the longest difference comes from the longest times then that egg is the lighter.
-- If you think the chess rules are not fair, first beat Anand, Kasparov and Karpov then you can change them. Moral is, don't question the work of others if you don't know the reason why they did it.
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So you mean if I have two object with the same volume, one is a 200KG iron balloon and another inflated with helium, they will fall at the same speed with a acceleration of 9.8 m/s² towards earth?? :-D Lets give a try and drop the two from a second floor, I'll be waiting for the helium balloon to catch it and you will be waiting for the iron balloon. :laugh::) Lets make sure an ambulance is on site.
-- If you think the chess rules are not fair, first beat Anand, Kasparov and Karpov then you can change them. Moral is, don't question the work of others if you don't know the reason why they did it.
In a vacuum yes. In atmosphere the HE one will fall slower since the drag force is proportional to cross sectional area. Both will feel an identical force but unless you compress 200kg of helium into the balloon it will have a lower mass and higher acceleration from drag in the direction opposite it's path.
-- Rules of thumb should not be taken for the whole hand.
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Unless I'm very mistaken, bodies fall at the same rate towards the Earth (or any other body) at the same rate. The ideal condition is vacuum, but if there is air/wind, it offers significant resistance; which explains why a block of wood falls faster than a feather. I still stand by what I said; I don't understand the point you're trying to make. :~
Cheers, Vikram.
"Life isn't fair, and the world is full of unscrupulous characters. There are things worth fighting for, killing for and dying for, but it's a really small list. Chalk it up to experience, let it go, and move on to the next positive experience in your life." - Christopher Duncan.
you're right about your point, but it's only valid in vacuum. That's what I learned. You're entitled on your opinion.
Vikram A Punathambekar wrote:
I don't understand the point you're trying to make
The egg thing was a joke, nothing more, nothing less, you're just making a big deal out of it.
V.
Stop smoking so you can: Enjoy longer the money you save. Moviereview Archive -
Vikram A Punathambekar wrote:
Unless I'm very mistaken, bodies fall at the same rate towards the Earth (or any other body) at the same rate.
The department of irrelevant nitpicking would like to point out that while the Earth attracts a BB and a boulder equally the boulder applies a stronger force on the Earth. As a result in a vacuum the boulder will appear to fall faster as observed by someone on the Earth's surface by an infinitesimal rate. You'd need to drop something the size of a large moon to see any visible difference. :rolleyes:
-- Rules of thumb should not be taken for the whole hand.
dan neely wrote:
The department of irrelevant nitpicking
:laugh: thank you so much :-)
V.
Stop smoking so you can: Enjoy longer the money you save. Moviereview Archive -
In a vacuum yes. In atmosphere the HE one will fall slower since the drag force is proportional to cross sectional area. Both will feel an identical force but unless you compress 200kg of helium into the balloon it will have a lower mass and higher acceleration from drag in the direction opposite it's path.
-- Rules of thumb should not be taken for the whole hand.
Exactly, atomic weight is the key using the atmosphere as environment, for that reason dropping the eggs from the empire state building to measure the weight can be realized. If you compress 200Kg of helium on the same volume you got the same "volume weight", so they will fall at the same speed/rate in any environment. (Of course shape will vary the speed because of air resistance, but if we are talking about eggs the shape won't “almost” affect the air resistance between them because all have the same shape) For the experiment to work more precise should be balls and not eggs.
-- If you think the chess rules are not fair, first beat Anand, Kasparov and Karpov then you can change them. Moral is, don't question the work of others if you don't know the reason why they did it.
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Drop the eggs from the empire state building on a calm day. Measure the time that take each egg to fall. Compare the two shortest and longest times, the longest times difference will give the unique egg, if the longer difference is form the two first eggs in the list then that egg is heavier, if the longest difference comes from the longest times then that egg is the lighter.
-- If you think the chess rules are not fair, first beat Anand, Kasparov and Karpov then you can change them. Moral is, don't question the work of others if you don't know the reason why they did it.
Now a second though, that will depend of the difference in weight in the unique egg, if the difference is not big enough, the air resistance will vary the fall of the egg because of the shape and will affect the time to fall more than the weight it self and probably the experiment won’t be valid :( Also I'll do a mess in the floor of the building and I'll get arrested for throwing stuff from the roof. :)
-- If you think the chess rules are not fair, first beat Anand, Kasparov and Karpov then you can change them. Moral is, don't question the work of others if you don't know the reason why they did it.