Science desk | ||
---|---|---|
< September 26 | << Aug | September | Oct >> | September 28 > |
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. |
A group from out work did volunteer ground clearance in a park. Everyone wanted to chop down trees, even though it was much harder work than litter picking or leaf raking. I have read that demolition work has one of the highest levels of job satisfaction and I can believe it - it looks fun! A lot of people also engage in mindless vandalism. Why is destroying things so much fun? Is there any evolutionary advantage to this? It seems to me that most people would build a building out of necessity but knock one down for fun!. -- Q Chris ( talk) 12:10, 27 September 2010 (UTC)
I do not agree that destroying things is fun. To me trees are precious, I would hate to destroy any. Building something would be better. However chopping trees down has far more drama and variety than leaf-picking, and may be preferred for those reasons. 92.15.25.79 ( talk) 18:43, 27 September 2010 (UTC)
Surely if light and matter were created simultaneously at the time of the Big Bang, such light would have passed us by immediately and be billions of light years ahead of us rather than behind? Or are we looking at that light "from behind" as it accelerates away from us into the future?
Many thanks indeed for any explanation.
—Preceding unsigned comment added by 222.123.128.194 ( talk) 15:32, 27 September 2010 (UTC)
Are there any more up-to-date numbers on the UK sources of fuel than these from the 1990s?
-- CGPGrey (talk) 17:03, 27 September 2010 (UTC)
Preparing for a Physiology class later this week, I've put together a square-wave stimulator, some electrodes, and tested them by shocking myself on the forearm (slightly dampened with some salt water.) One thing I discovered after comparing electrodes borrowed from another college nearby, made with paper clips (aluminum?), with the ones I made (copper wire) is that the shock is more detectable and dramatic with the paper clip electrodes.
I have no idea why this is, but would love to have an explanation before some student asks me.
Any ideas? Wevets ( talk) 18:18, 27 September 2010 (UTC)
Copper is actually a much better conductor than aluminum (see Electrical conductivity) 174.131.80.53 ( talk) 18:35, 30 September 2010 (UTC)
The reference desk is a place for asking for information, not for lengthy presentations of original ideas -- collapsing due to length. Looie496 ( talk) 20:00, 27 September 2010 (UTC) |
---|
The following discussion has been closed. Please do not modify it. |
Hello Wikipedia, I have recently found your name (Wikipedia) as a reference on a book. So, I am going to ask the following question: could it be that: Gravity is, in my opinion, originally generated from the medium i.e. the Vacuum and Vacuum energy, on masses. the vacuum energy 10^107 joules per cubic centimeter creates a force (a repulsive in nature, since energy of vacuum is different from energy of mass and mass surface) on the mass surface, similar to surface tension force. The body of the mass provides a surface where vacuum energy fluctuations (waves?)could reflects off. these reflections of the vacuum energy would then become "synchronized" when reflected off the mass surface into high and low energy waves sinusoidal mathematical functions (orbits) mixed with other geometrical representing motion mathematical functions pending on Vacuum and Vacuum energy medium surrounding the mass. The density of the mass would be a deciding factor of the frequency of the vacuum energy synchronized reflection, in such a way that shorter wave reflected will form from a denser body (black hole). When two masses are within the fields of each others synchronized reflected vacuum energy waves(gravitational forces filed), they "shadow" each other from the non reflected vacuum and vacuum energy waves fluctuations; therefore falling into a lesser, a weaker repulsive medium, resulting in the observed attraction of the two masses to each other.--e:Y,?:G 06:37, 15 September 2010 (UTC) —Preceding unsigned comment added by E:Y,?:G (talk • contribs) The Black Hole event horizon support's the above suggested mechanism for Vacuum energy synchronized wave reflection off mass's bodies, in a way that the mass of the black hole is so dense that the vacuum energy waves reflected have wave length that does not support to carry the light waves or the electromagnetic waves as a lesser density mass bodies do. Or the unreflectiveness of light off the Black Hole mass body, is may be because these vacuum energy synchronized wave reflection off the mass's bodies, must reflects off a body not of the dimensions of the Black Hole mass i.e. less than 5 solar masses. The form these vacuum energy waves reflected off the mass must meet a certain geometrical dimensions. gravitational lensing is another example supporting the above suggested mechanism in a way that the reflected vacuum energy waves off dense bodies are not synchronized in the same way the lesser denser mass bodies do. Another conclulsion form the above suggested mechanism for vacuum energy synchronized wave reflection off mass's boies, is it must be in a certien formate for it to "carry" light and electromagnatic waves. and could be that, Taking into considerations E = M C^2, different type of matters with respect of their density's, differently reflects, i.e. in a different patterns, the Vacuum energy fluctuations (Casimir effect). In my opinion, the synchronized reflections of vacuum energy fluctuations off of a mass constitute the gravitational forces for that mass. In compression to a lesser density mass such as the earth, the matter in the black hole within the event horizon (equation of state), (UC Berkeley, September 24, 2010, high pressure experiments reproduce mineral structure 1,800 miles deep in the earth: where seismic waves have different patterns when run through post-pervoskite's zone of Magnesium silicate perovskite (MgSiO3) above the earth core). In my opinion, The Matter of a lesser density such as the earth matter, would react differently than the matter of the Black Hole to Vacuum waves, vacuum fluctuations, vacuum energy, which (the vacuum energy fluctuation ) when reflected off of these two different matters (equation of state) creates different synchronized reflected vacuum energy waves i.e. different gravitational forces; Where synchronized reflected vacuum energy waves is a gravitational force for a set, a defined system that has a specific equation of state. Also, The matter of the Black Hole (within the event horizon) may not reflects electromagnetic waves, since light have two components vectors: electric and magnetic, as it (the light) does reflects off of a lesser denser mass's such as the earth; therefore no light reflects off of a black hole matter, as observed. (UC Berkeley, September 24, 2010, high pressure experiments reproduce mineral structure 1,800 miles deep in the earth: where seismic waves have different patterns when run through post-pervoskite's zone of Magnesium silicate perovskite (MgSiO3) above the earth core). Or/and, the vacuum, vacuum energy of the atmosphere of a black hole will not support to carry light waves (or, most electromagnitic waves within the "atomspher" of the mass of the black hole. and light speedThat constitute that If we defined the atmosphere of a black hole to be the space between it's event horizon and it's mass surface, and if the rules of equation of state where to apply within the event horizon of a black hole atmosphere's with consideration to light travel; then E = M C^2 as an equation of state, could not probably be applied or used within the atmosphere of a black hole. E = M C^2 is does not apply in the black hole as a Equation of state for the absence of most electromagnetic waves spectrum (Hawking radiation existence?).--e:Y,?:G 19:58, 25 September 2010 (UTC)--e:Y,?:G 19:58, 25 September 2010 (UTC) —Preceding unsigned comment added by E:Y,?:G (talk • contribs The reflection of the vacuum waves off a mass's body could work as "sonar" in way or light reflection in way to evaluate a mass density.--e:Y,?:G 08:44, 15 September 2010 (UTC) —Preceding unsigned comment added by E:Y,?:G (talk • contribs) --e:Y,?:G 21:55, 17 September 2010 (UTC) --e:Y,?:G 18:24, 27 September 2010 (UTC) —Preceding unsigned comment added by E:Y,?:G ( talk • contribs) thank you --e:Y,?:G 18:27, 27 September 2010 (UTC) |
I saw a mention about electro-conductive body paint in an episode of C.S.I. Miami. Does such a thing really exist? Isn't it a pretty stupid idea? What prevents the current from entering the wearer's body, potentially electrocuting him/her? JIP | Talk 18:36, 27 September 2010 (UTC)
At our article on Paramecium there is a paragraph in dispute. It is alleged that an experiment has shown that Paramecium may be able to communicate with other Paramecium over short distances with the use of electromagnetic signals. The dispute is over whether this is an April Fools' Day joke. Bus stop ( talk) 20:33, 27 September 2010 (UTC)
He replied:
Dear Ariel Thanks for your interest. Here my answers. 1) It is not a fools joke. 2) For the time being I am the only one who does this type of experiments with Paramecia but by far not the only one who does this type of experiment. 3) Actually, you can see my paper also as a repetition of previous studies but with another organism. 4) I apologize for not contributing on your blog. A remark after reading your discussion. Single author does not mean bad work. Experiment 1 was 14 times repeated. This is a big sample size. Please, do not talk in such a sloppy way about other people's work. It took about 700 working hours to do all experiments, read into the literature, permanently hand out my paper to my critical collegues checking for errors, making it waterproof, double-check the statistics and so on ... Note, the field is old (1923) but only few people work on it. These people have to convince the Scientific community about the reality of so-called bio-photons. Join in in a construcitve way. Yours friendly Daniel Fels PS: Maybe you and your friends have a (long) glance at this recent review.
Attached was a pdf titled: "Electromagnetic cellular interactions" by "Michal Cifra, Jeremy Z. Fields, Ashkan Farhadi". doi:10.1016/j.pbiomolbio.2010.07.003 Ariel. ( talk) 09:56, 29 September 2010 (UTC)
Do metal oxides catalyze the oxidation of isopropanol by sodium hypochlorite? -- Chemicalinterest ( talk) 23:18, 27 September 2010 (UTC)
Science desk | ||
---|---|---|
< September 26 | << Aug | September | Oct >> | September 28 > |
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. |
A group from out work did volunteer ground clearance in a park. Everyone wanted to chop down trees, even though it was much harder work than litter picking or leaf raking. I have read that demolition work has one of the highest levels of job satisfaction and I can believe it - it looks fun! A lot of people also engage in mindless vandalism. Why is destroying things so much fun? Is there any evolutionary advantage to this? It seems to me that most people would build a building out of necessity but knock one down for fun!. -- Q Chris ( talk) 12:10, 27 September 2010 (UTC)
I do not agree that destroying things is fun. To me trees are precious, I would hate to destroy any. Building something would be better. However chopping trees down has far more drama and variety than leaf-picking, and may be preferred for those reasons. 92.15.25.79 ( talk) 18:43, 27 September 2010 (UTC)
Surely if light and matter were created simultaneously at the time of the Big Bang, such light would have passed us by immediately and be billions of light years ahead of us rather than behind? Or are we looking at that light "from behind" as it accelerates away from us into the future?
Many thanks indeed for any explanation.
—Preceding unsigned comment added by 222.123.128.194 ( talk) 15:32, 27 September 2010 (UTC)
Are there any more up-to-date numbers on the UK sources of fuel than these from the 1990s?
-- CGPGrey (talk) 17:03, 27 September 2010 (UTC)
Preparing for a Physiology class later this week, I've put together a square-wave stimulator, some electrodes, and tested them by shocking myself on the forearm (slightly dampened with some salt water.) One thing I discovered after comparing electrodes borrowed from another college nearby, made with paper clips (aluminum?), with the ones I made (copper wire) is that the shock is more detectable and dramatic with the paper clip electrodes.
I have no idea why this is, but would love to have an explanation before some student asks me.
Any ideas? Wevets ( talk) 18:18, 27 September 2010 (UTC)
Copper is actually a much better conductor than aluminum (see Electrical conductivity) 174.131.80.53 ( talk) 18:35, 30 September 2010 (UTC)
The reference desk is a place for asking for information, not for lengthy presentations of original ideas -- collapsing due to length. Looie496 ( talk) 20:00, 27 September 2010 (UTC) |
---|
The following discussion has been closed. Please do not modify it. |
Hello Wikipedia, I have recently found your name (Wikipedia) as a reference on a book. So, I am going to ask the following question: could it be that: Gravity is, in my opinion, originally generated from the medium i.e. the Vacuum and Vacuum energy, on masses. the vacuum energy 10^107 joules per cubic centimeter creates a force (a repulsive in nature, since energy of vacuum is different from energy of mass and mass surface) on the mass surface, similar to surface tension force. The body of the mass provides a surface where vacuum energy fluctuations (waves?)could reflects off. these reflections of the vacuum energy would then become "synchronized" when reflected off the mass surface into high and low energy waves sinusoidal mathematical functions (orbits) mixed with other geometrical representing motion mathematical functions pending on Vacuum and Vacuum energy medium surrounding the mass. The density of the mass would be a deciding factor of the frequency of the vacuum energy synchronized reflection, in such a way that shorter wave reflected will form from a denser body (black hole). When two masses are within the fields of each others synchronized reflected vacuum energy waves(gravitational forces filed), they "shadow" each other from the non reflected vacuum and vacuum energy waves fluctuations; therefore falling into a lesser, a weaker repulsive medium, resulting in the observed attraction of the two masses to each other.--e:Y,?:G 06:37, 15 September 2010 (UTC) —Preceding unsigned comment added by E:Y,?:G (talk • contribs) The Black Hole event horizon support's the above suggested mechanism for Vacuum energy synchronized wave reflection off mass's bodies, in a way that the mass of the black hole is so dense that the vacuum energy waves reflected have wave length that does not support to carry the light waves or the electromagnetic waves as a lesser density mass bodies do. Or the unreflectiveness of light off the Black Hole mass body, is may be because these vacuum energy synchronized wave reflection off the mass's bodies, must reflects off a body not of the dimensions of the Black Hole mass i.e. less than 5 solar masses. The form these vacuum energy waves reflected off the mass must meet a certain geometrical dimensions. gravitational lensing is another example supporting the above suggested mechanism in a way that the reflected vacuum energy waves off dense bodies are not synchronized in the same way the lesser denser mass bodies do. Another conclulsion form the above suggested mechanism for vacuum energy synchronized wave reflection off mass's boies, is it must be in a certien formate for it to "carry" light and electromagnatic waves. and could be that, Taking into considerations E = M C^2, different type of matters with respect of their density's, differently reflects, i.e. in a different patterns, the Vacuum energy fluctuations (Casimir effect). In my opinion, the synchronized reflections of vacuum energy fluctuations off of a mass constitute the gravitational forces for that mass. In compression to a lesser density mass such as the earth, the matter in the black hole within the event horizon (equation of state), (UC Berkeley, September 24, 2010, high pressure experiments reproduce mineral structure 1,800 miles deep in the earth: where seismic waves have different patterns when run through post-pervoskite's zone of Magnesium silicate perovskite (MgSiO3) above the earth core). In my opinion, The Matter of a lesser density such as the earth matter, would react differently than the matter of the Black Hole to Vacuum waves, vacuum fluctuations, vacuum energy, which (the vacuum energy fluctuation ) when reflected off of these two different matters (equation of state) creates different synchronized reflected vacuum energy waves i.e. different gravitational forces; Where synchronized reflected vacuum energy waves is a gravitational force for a set, a defined system that has a specific equation of state. Also, The matter of the Black Hole (within the event horizon) may not reflects electromagnetic waves, since light have two components vectors: electric and magnetic, as it (the light) does reflects off of a lesser denser mass's such as the earth; therefore no light reflects off of a black hole matter, as observed. (UC Berkeley, September 24, 2010, high pressure experiments reproduce mineral structure 1,800 miles deep in the earth: where seismic waves have different patterns when run through post-pervoskite's zone of Magnesium silicate perovskite (MgSiO3) above the earth core). Or/and, the vacuum, vacuum energy of the atmosphere of a black hole will not support to carry light waves (or, most electromagnitic waves within the "atomspher" of the mass of the black hole. and light speedThat constitute that If we defined the atmosphere of a black hole to be the space between it's event horizon and it's mass surface, and if the rules of equation of state where to apply within the event horizon of a black hole atmosphere's with consideration to light travel; then E = M C^2 as an equation of state, could not probably be applied or used within the atmosphere of a black hole. E = M C^2 is does not apply in the black hole as a Equation of state for the absence of most electromagnetic waves spectrum (Hawking radiation existence?).--e:Y,?:G 19:58, 25 September 2010 (UTC)--e:Y,?:G 19:58, 25 September 2010 (UTC) —Preceding unsigned comment added by E:Y,?:G (talk • contribs The reflection of the vacuum waves off a mass's body could work as "sonar" in way or light reflection in way to evaluate a mass density.--e:Y,?:G 08:44, 15 September 2010 (UTC) —Preceding unsigned comment added by E:Y,?:G (talk • contribs) --e:Y,?:G 21:55, 17 September 2010 (UTC) --e:Y,?:G 18:24, 27 September 2010 (UTC) —Preceding unsigned comment added by E:Y,?:G ( talk • contribs) thank you --e:Y,?:G 18:27, 27 September 2010 (UTC) |
I saw a mention about electro-conductive body paint in an episode of C.S.I. Miami. Does such a thing really exist? Isn't it a pretty stupid idea? What prevents the current from entering the wearer's body, potentially electrocuting him/her? JIP | Talk 18:36, 27 September 2010 (UTC)
At our article on Paramecium there is a paragraph in dispute. It is alleged that an experiment has shown that Paramecium may be able to communicate with other Paramecium over short distances with the use of electromagnetic signals. The dispute is over whether this is an April Fools' Day joke. Bus stop ( talk) 20:33, 27 September 2010 (UTC)
He replied:
Dear Ariel Thanks for your interest. Here my answers. 1) It is not a fools joke. 2) For the time being I am the only one who does this type of experiments with Paramecia but by far not the only one who does this type of experiment. 3) Actually, you can see my paper also as a repetition of previous studies but with another organism. 4) I apologize for not contributing on your blog. A remark after reading your discussion. Single author does not mean bad work. Experiment 1 was 14 times repeated. This is a big sample size. Please, do not talk in such a sloppy way about other people's work. It took about 700 working hours to do all experiments, read into the literature, permanently hand out my paper to my critical collegues checking for errors, making it waterproof, double-check the statistics and so on ... Note, the field is old (1923) but only few people work on it. These people have to convince the Scientific community about the reality of so-called bio-photons. Join in in a construcitve way. Yours friendly Daniel Fels PS: Maybe you and your friends have a (long) glance at this recent review.
Attached was a pdf titled: "Electromagnetic cellular interactions" by "Michal Cifra, Jeremy Z. Fields, Ashkan Farhadi". doi:10.1016/j.pbiomolbio.2010.07.003 Ariel. ( talk) 09:56, 29 September 2010 (UTC)
Do metal oxides catalyze the oxidation of isopropanol by sodium hypochlorite? -- Chemicalinterest ( talk) 23:18, 27 September 2010 (UTC)