Science desk | ||
---|---|---|
< January 19 | << Dec | January | Feb >> | January 21 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
I cannot understand what is said by the articles: protist and algae. The article protist includes algae int it and says that protists are eukaryotic. But the aticle about algae includes cyanobacterias which are prokaryotic. These articles' facts are opposing each other. The article about cyanobacteria includes the cyanobacteria into bacteria domain. But in the article algae there are sentences like this:
So if algae are protists(as mentioned) and protists are eukaryotes (as mentioned), then cyanobacterias should not be included in algae because they don't have a membrane bounded nucleus. What can we do? -- G.Kiruthikan ( talk) 04:47, 20 January 2014 (UTC)
I have now understood why there were contradictions. But we should make sure that other readers will not get any of the contradictions. Then all will got complicated. (I don't know the grammer well). Some books say that the classification of protists is not natural but rather it is artificial. They say that protists include organisms with many different evolutionary traits and no very recent evolutionary similarities. So regarding this point I think that there is no way of getting out of this complication. The only thing that matters is that according to Wikipedia's article, all protists are eukaryotic. So I think there is a small possibility of excluding cyanobacterias from protists.-- G.Kiruthikan ( talk) 02:43, 22 January 2014 (UTC)
Every since I started messing with cars I've heard that automobile spark plugs and their the wires contain resistors. Supposedly this eliminates RF noise from interfering with radio reception. On Wikipedia's Spark Plug page I found this statement:
The central electrode is connected to the terminal through an internal wire and commonly a ceramic series resistance to reduce emission of RF noise from the sparking.
That's great. Why does it work? — Preceding unsigned comment added by 50.43.12.61 ( talk) 06:48, 20 January 2014 (UTC)
Do the different isotopes of lead emit electromagnetic radiations of different wavelengths? or Do all four isotopes emit electromagnetic radiations of same wavelengths when they are decaying? — Preceding unsigned comment added by 27.62.251.166 ( talk) 13:11, 20 January 2014 (UTC)
I want to know whether it fixed that a particular isotope would emit electromagnetic radiations (EMR) having only a certain specified range of wavelengths (i.e., wavelength of EMR emitted by Pb-210 is different from Pb-211) or the wavelengths of EMR emitted is independent of the isotope used. 106.216.118.149 ( talk) 14:45, 20 January 2014 (UTC)
Hello, I witnessed some curious behavior making breakfast recently, and hope you can help clear it up. I whisked two eggs together in a clear measuring cup, until fairly homogenous. I then added a bit (15-20cc) of whole milk, and did not stir. Both eggs and milk were roughly the same temperature, straight from the fridge. The resulting mixture had a distinctly inhomogenous, marbled look, which is as expected (basically like this [1], but even less mixed, and with less milk. The important part is the borders are very sharp).
When I sprinkled a few shakes of salt on top, the veins of milk on the surface started wiggling and writhing, making the previously sharp and stable milk/egg border roil. It really caught my eye, as it reminded me of Diffusion-limited_aggregation or vortex shedding or some other clever pattern formation thing.
What's going on here? Something to do with surface tensions? Ions? Would there be any real "reactions" leading to a reaction-diffusion system? Anyway, I highly suggest you take a look next time you make scrambled eggs. Thanks! SemanticMantis ( talk) 18:11, 20 January 2014 (UTC)
Are Chinese foo yungs healthy? Clover345 ( talk) 22:18, 20 January 2014 (UTC)
I was talking to my neighbor recently, and he recommended applying Rubbing_alcohol to a sore muscle, and vigorously rubbing it in to provide relief. Thus, the name rubbing alcohol. The article here makes no mention of such a use, or why it is called rubbing alcohol. I have no intention of trying this, but I was curious. Is this a common, safe, or valid use of the product? Cthulhu42 ( talk) 22:36, 20 January 2014 (UTC)
Science desk | ||
---|---|---|
< January 19 | << Dec | January | Feb >> | January 21 > |
Welcome to the Wikipedia Science Reference Desk Archives |
---|
The page you are currently viewing is an archive page. While you can leave answers for any questions shown below, please ask new questions on one of the current reference desk pages. |
I cannot understand what is said by the articles: protist and algae. The article protist includes algae int it and says that protists are eukaryotic. But the aticle about algae includes cyanobacterias which are prokaryotic. These articles' facts are opposing each other. The article about cyanobacteria includes the cyanobacteria into bacteria domain. But in the article algae there are sentences like this:
So if algae are protists(as mentioned) and protists are eukaryotes (as mentioned), then cyanobacterias should not be included in algae because they don't have a membrane bounded nucleus. What can we do? -- G.Kiruthikan ( talk) 04:47, 20 January 2014 (UTC)
I have now understood why there were contradictions. But we should make sure that other readers will not get any of the contradictions. Then all will got complicated. (I don't know the grammer well). Some books say that the classification of protists is not natural but rather it is artificial. They say that protists include organisms with many different evolutionary traits and no very recent evolutionary similarities. So regarding this point I think that there is no way of getting out of this complication. The only thing that matters is that according to Wikipedia's article, all protists are eukaryotic. So I think there is a small possibility of excluding cyanobacterias from protists.-- G.Kiruthikan ( talk) 02:43, 22 January 2014 (UTC)
Every since I started messing with cars I've heard that automobile spark plugs and their the wires contain resistors. Supposedly this eliminates RF noise from interfering with radio reception. On Wikipedia's Spark Plug page I found this statement:
The central electrode is connected to the terminal through an internal wire and commonly a ceramic series resistance to reduce emission of RF noise from the sparking.
That's great. Why does it work? — Preceding unsigned comment added by 50.43.12.61 ( talk) 06:48, 20 January 2014 (UTC)
Do the different isotopes of lead emit electromagnetic radiations of different wavelengths? or Do all four isotopes emit electromagnetic radiations of same wavelengths when they are decaying? — Preceding unsigned comment added by 27.62.251.166 ( talk) 13:11, 20 January 2014 (UTC)
I want to know whether it fixed that a particular isotope would emit electromagnetic radiations (EMR) having only a certain specified range of wavelengths (i.e., wavelength of EMR emitted by Pb-210 is different from Pb-211) or the wavelengths of EMR emitted is independent of the isotope used. 106.216.118.149 ( talk) 14:45, 20 January 2014 (UTC)
Hello, I witnessed some curious behavior making breakfast recently, and hope you can help clear it up. I whisked two eggs together in a clear measuring cup, until fairly homogenous. I then added a bit (15-20cc) of whole milk, and did not stir. Both eggs and milk were roughly the same temperature, straight from the fridge. The resulting mixture had a distinctly inhomogenous, marbled look, which is as expected (basically like this [1], but even less mixed, and with less milk. The important part is the borders are very sharp).
When I sprinkled a few shakes of salt on top, the veins of milk on the surface started wiggling and writhing, making the previously sharp and stable milk/egg border roil. It really caught my eye, as it reminded me of Diffusion-limited_aggregation or vortex shedding or some other clever pattern formation thing.
What's going on here? Something to do with surface tensions? Ions? Would there be any real "reactions" leading to a reaction-diffusion system? Anyway, I highly suggest you take a look next time you make scrambled eggs. Thanks! SemanticMantis ( talk) 18:11, 20 January 2014 (UTC)
Are Chinese foo yungs healthy? Clover345 ( talk) 22:18, 20 January 2014 (UTC)
I was talking to my neighbor recently, and he recommended applying Rubbing_alcohol to a sore muscle, and vigorously rubbing it in to provide relief. Thus, the name rubbing alcohol. The article here makes no mention of such a use, or why it is called rubbing alcohol. I have no intention of trying this, but I was curious. Is this a common, safe, or valid use of the product? Cthulhu42 ( talk) 22:36, 20 January 2014 (UTC)