Science desk | ||
---|---|---|
< November 21 | << Oct | November | Dec >> | November 23 > |
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. |
At least for plants and animals. Are odd fatty acids more common in other kingdoms? Why aren't there more short fats like triformin and triacetin in bulk fat/oil? Why are only a few omegas common like omega-3, -6, -7, and -9? Sagittarian Milky Way ( talk) 04:11, 22 November 2017 (UTC)
Why are only a few omegas common like omega-3, -6, -7, and -9?, hmm, Omega-3 fatty acid#Structure might be informative, particularly that huge image caption (which really should be moved into the article body). It might have something to do with their properties vis-a-vis cell membranes. The omega nomenclature is a means of classifying different types of polyunsaturated fatty acids; the relative amount of saturated-to-unsaturated fatty acids in cell membranes affects their properties. In particular, DHA is a very important component of brain neuron cell membranes. But I'm not sure of an exact answer to your question; maybe someone who knows more about biochemistry can help. -- 47.157.122.192 ( talk) 21:18, 22 November 2017 (UTC)
I recently watched a youtube playlist on General Relativity titled " Curved SpaceTime and General Relativity" and I have a couple questions.
The playlist is a very quick overview of some of the major muscle movements regarding General Relativity. It builds up to the conclusion that 4-dimensional spacetime is not flat but curved, which brings me to my first question: The curvature of a 4-dimensional object implies that there is a fifth dimension, correct? If so, is there any scientific understanding of what this fifth dimension is?
Second, one of the videos in the playlist, titled Is Gravity An Illusion?, speaks to the difference between Newton and Einstein's description of gravity. The main point being that Newton viewed gravity as an actual force and Einstein viewed it as an implied force. The video seems to claim that Newton would view an apple falling to earth as an apple falling down toward a earth & Einstein viewed an apple falling to earth as the apple being more stationary and the earth moving up toward the apple. I suspect this depiction is less intent on being scientifically accurate than it is to get people to stop relying on their "common sense" notions of science - as a necessary step for grasping General Relativity.
So, can anyone confirm which is actually the case regarding the apple? The playlist as a whole seems to be saying that falling objects are under the influence of spacetime curvature not the Newton concept of gravity. That said, what of a falling apple on earth? Does curved spacetime bring the apple towards earth or earth towards the apple? If it is the earth towards the apple, can anyone point me to good explanations of how that is so because I'm still not clear on that point.
128.229.4.2 ( talk) 14:35, 22 November 2017 (UTC)
In civil engineering and programme management, which type of organisation is seen as the most prestigious to work for? Client, contractor, design consultant or programme management consultant? 193.240.153.130 ( talk) 16:22, 22 November 2017 (UTC)
Science desk | ||
---|---|---|
< November 21 | << Oct | November | Dec >> | November 23 > |
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. |
At least for plants and animals. Are odd fatty acids more common in other kingdoms? Why aren't there more short fats like triformin and triacetin in bulk fat/oil? Why are only a few omegas common like omega-3, -6, -7, and -9? Sagittarian Milky Way ( talk) 04:11, 22 November 2017 (UTC)
Why are only a few omegas common like omega-3, -6, -7, and -9?, hmm, Omega-3 fatty acid#Structure might be informative, particularly that huge image caption (which really should be moved into the article body). It might have something to do with their properties vis-a-vis cell membranes. The omega nomenclature is a means of classifying different types of polyunsaturated fatty acids; the relative amount of saturated-to-unsaturated fatty acids in cell membranes affects their properties. In particular, DHA is a very important component of brain neuron cell membranes. But I'm not sure of an exact answer to your question; maybe someone who knows more about biochemistry can help. -- 47.157.122.192 ( talk) 21:18, 22 November 2017 (UTC)
I recently watched a youtube playlist on General Relativity titled " Curved SpaceTime and General Relativity" and I have a couple questions.
The playlist is a very quick overview of some of the major muscle movements regarding General Relativity. It builds up to the conclusion that 4-dimensional spacetime is not flat but curved, which brings me to my first question: The curvature of a 4-dimensional object implies that there is a fifth dimension, correct? If so, is there any scientific understanding of what this fifth dimension is?
Second, one of the videos in the playlist, titled Is Gravity An Illusion?, speaks to the difference between Newton and Einstein's description of gravity. The main point being that Newton viewed gravity as an actual force and Einstein viewed it as an implied force. The video seems to claim that Newton would view an apple falling to earth as an apple falling down toward a earth & Einstein viewed an apple falling to earth as the apple being more stationary and the earth moving up toward the apple. I suspect this depiction is less intent on being scientifically accurate than it is to get people to stop relying on their "common sense" notions of science - as a necessary step for grasping General Relativity.
So, can anyone confirm which is actually the case regarding the apple? The playlist as a whole seems to be saying that falling objects are under the influence of spacetime curvature not the Newton concept of gravity. That said, what of a falling apple on earth? Does curved spacetime bring the apple towards earth or earth towards the apple? If it is the earth towards the apple, can anyone point me to good explanations of how that is so because I'm still not clear on that point.
128.229.4.2 ( talk) 14:35, 22 November 2017 (UTC)
In civil engineering and programme management, which type of organisation is seen as the most prestigious to work for? Client, contractor, design consultant or programme management consultant? 193.240.153.130 ( talk) 16:22, 22 November 2017 (UTC)