Rajnish Kaushik Posted January 26, 2014 Share Posted January 26, 2014 (edited) If you are provided with 1 iron rod and 1 magnet rod both equal in size weight and colour then how will you find out which one is magnet and which one is iron? Edited January 26, 2014 by Rajnish Kaushik Link to comment Share on other sites More sharing options...
Fuzzwood Posted January 26, 2014 Share Posted January 26, 2014 The center of the magnet is the least strong, so aim the end of one rod to the center of the other one and see which one jumps up from a greater distance apart. 1 Link to comment Share on other sites More sharing options...
Olinguito Posted January 28, 2014 Share Posted January 28, 2014 (edited) Suspend them and see which one always points north–south. Edited January 28, 2014 by Olinguito 1 Link to comment Share on other sites More sharing options...
Rajnish Kaushik Posted January 28, 2014 Author Share Posted January 28, 2014 Suspend them and see which one always points north–south. you did not have a string The center of the magnet is the least strong, so aim the end of one rod to the center of the other one and see which one jumps up from a greater distance apart. your answer is reasonable Link to comment Share on other sites More sharing options...
iNow Posted January 28, 2014 Share Posted January 28, 2014 you did not have a stringThen place it on a low friction surface. Over time, you should see the same result. Link to comment Share on other sites More sharing options...
Rajnish Kaushik Posted January 28, 2014 Author Share Posted January 28, 2014 Then place it on a low friction surface. Over time, you should see the same result. no frictionless surface then............ Link to comment Share on other sites More sharing options...
Ankit Gupta Posted January 28, 2014 Share Posted January 28, 2014 Break both of them and then see which of the rod's parts interact with each other , which shows interactions is magnet and other is iron rod Link to comment Share on other sites More sharing options...
Rajnish Kaushik Posted January 28, 2014 Author Share Posted January 28, 2014 Break both of them and then see which of the rod's parts interact with each other , which shows interactions is magnet and other is iron rod how will you break them -1 Link to comment Share on other sites More sharing options...
iNow Posted January 28, 2014 Share Posted January 28, 2014 no frictionless surface then............I didn't say "frictionless," I said "low friction." Would you not be standing on a floor? Would the items not have been placed on a table? Do you have any critical thinking skills of your own, or do you expect us to spoon feed every answer to you one by one? -1 Link to comment Share on other sites More sharing options...
Rajnish Kaushik Posted January 28, 2014 Author Share Posted January 28, 2014 I didn't say "frictionless," I said "low friction." Would you not be standing on a floor? Would the items not have been placed on a table? Do you have any critical thinking skills of your own, or do you expect us to spoon feed every answer to you one by one? i already know the answer and if you are on a rough surface Link to comment Share on other sites More sharing options...
iNow Posted January 28, 2014 Share Posted January 28, 2014 and if you are on a rough surfaceThis sentence appears to be missing a THEN clause... Did you wish to finish your thought, or would you rather leave this as an orphaned and broken sentence in its current form? Link to comment Share on other sites More sharing options...
John Cuthber Posted January 28, 2014 Share Posted January 28, 2014 This sentence appears to be missing a THEN clause... Did you wish to finish your thought, or would you rather leave this as an orphaned and broken sentence in its current form? To be fair, I don't think that's what it's missing, you could include the "Then" clause... Link to comment Share on other sites More sharing options...
Olinguito Posted January 28, 2014 Share Posted January 28, 2014 This sentence appears to be missing a THEN clause... Did you wish to finish your thought, or would you rather leave this as an orphaned and broken sentence in its current form? It’s called aposiopesis. Link to comment Share on other sites More sharing options...
cresol Posted January 28, 2014 Share Posted January 28, 2014 As simple as it is.....distinguish them through the center of each specimen or break to identify Link to comment Share on other sites More sharing options...
Rajnish Kaushik Posted January 29, 2014 Author Share Posted January 29, 2014 As simple as it is.....distinguish them through the center of each specimen or break to identify As simple as it is.....distinguish them through the center of each specimen or break to identify It’s called aposiopesis. To be fair, I don't think that's what it's missing, you could include the "Then" clause... This sentence appears to be missing a THEN clause... Did you wish to finish your thought, or would you rather leave this as an orphaned and broken sentence in its current form? I didn't say "frictionless," I said "low friction." Would you not be standing on a floor? Would the items not have been placed on a table? Do you have any critical thinking skills of your own, or do you expect us to spoon feed every answer to you one by one? the answer is in the second post Link to comment Share on other sites More sharing options...
Ankit Gupta Posted January 29, 2014 Share Posted January 29, 2014 how will you break them<_< just through them on the floor or hot by any hard thing !!! And now don't say we are not on floor or we haven't any thing Link to comment Share on other sites More sharing options...
Rajnish Kaushik Posted January 29, 2014 Author Share Posted January 29, 2014 just through them on the floor or hot by any hard thing !!! And now don't say we are not on floor or we haven't any thing i said answer yourself i already stated that u r not provided with anything just read 2nd post Link to comment Share on other sites More sharing options...
Ankit Gupta Posted January 29, 2014 Share Posted January 29, 2014 Oh I didn't knew that floor also come in 'anything' then you can hit one of them by other then you will have either both or at least one of them broken Link to comment Share on other sites More sharing options...
Rajnish Kaushik Posted January 29, 2014 Author Share Posted January 29, 2014 Oh I didn't knew that floor also come in 'anything' then you can hit one of them by other then you will have either both or at least one of them broken just show me how will you break Link to comment Share on other sites More sharing options...
imatfaal Posted January 30, 2014 Share Posted January 30, 2014 Can we be a bit spherical cow in a frictionless vacuum about this question please - by which I mean lets not introduce extraneous extras till the original question has been answered to the satisfaction of all concerned. And if the OP has seen the answer that he believes is correct could he mention it explicitly - I have seen one of the answers of those that I believe are correct; I have also seen the canonical answer of the original differing question from Martin Gardner's book (which in this case is not the correct one) You have two iron rods one is magnetized - how can you tell which. You have no other equipment - all you can do is manipulate the rods. 1 Link to comment Share on other sites More sharing options...
Stetson Posted January 31, 2014 Share Posted January 31, 2014 Breaking the bars in half seems like a long shot. But suppose if you whacked both of the bars until one chips a sizeable piece. If the piece, when put back on, falls off then that is the iron rod. If it sticks, that it is the magnet. If you're still skeptical, it might be possible to do a body test. There is iron in blood, yes? Take both rods onto your palms and wait a while. If you see a difference in redness then the reddest would most likely be the palm holding the magnet. Then reduce the variables by switching the rods between palms and try and replicate the results. If the palming holding the now suspected magnet has a greater color of red than the other, I'm sure you have found the magnet. Link to comment Share on other sites More sharing options...
imatfaal Posted January 31, 2014 Share Posted January 31, 2014 Breaking the bars in half seems like a long shot. But suppose if you whacked both of the bars until one chips a sizeable piece. If the piece, when put back on, falls off then that is the iron rod. If it sticks, that it is the magnet. If you're still skeptical, it might be possible to do a body test. There is iron in blood, yes? Take both rods onto your palms and wait a while. If you see a difference in redness then the reddest would most likely be the palm holding the magnet. Then reduce the variables by switching the rods between palms and try and replicate the results. If the palming holding the now suspected magnet has a greater color of red than the other, I'm sure you have found the magnet. If you whack a magnet enough you end up with an iron rod! Percussion will demagnetize an iron rod. This may make one of the answers I have heard given a little obvious. Not sure the second idea could ever work - the actual amount of iron is pretty tiny. I think about a third of blood by weight is haemoglobin of some sort and about one percent of haemoglobin is iron. Link to comment Share on other sites More sharing options...
John Cuthber Posted January 31, 2014 Share Posted January 31, 2014 Why do people think hemoglobin is significantly magnetic? Link to comment Share on other sites More sharing options...
imatfaal Posted January 31, 2014 Share Posted January 31, 2014 Why do people think hemoglobin is significantly magnetic? I think that the feeling is that all iron in whatever form is intensely magnetic and everyone knows there is iron in blood because of the publicity regarding anaemia Link to comment Share on other sites More sharing options...
John Cuthber Posted February 1, 2014 Share Posted February 1, 2014 That's odd, because it is actually diamagnetic. Like water and a lot of other things, hemoglobin is repelled (weakly) by a magnet. Link to comment Share on other sites More sharing options...
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