Science desk | ||
---|---|---|
< August 11 | << Jul | August | Sep >> | August 13 > |
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 see such signs on American freeways. Why? My guess is because it is hard on the road? But I want to get a confirmation and perhaps an extended explanation why it is so.
Also why restricted? Why not prohibited? Is restricted the same as prohibited? I don't think so?
Thanks, - Alex 174.52.14.15 ( talk) 03:09, 12 August 2013 (UTC)
I've been under the impression that the engine braking involves the electrical generator. When the diesel fuel is cut off the truck moves forward under the gained momentum. The rotation of the wheels is eventually transferred to the generator which generates electricity that is stored in the rechargeable battery. The work invested in the process slows the truck down. The article quoted above does not mention this at all. — Preceding unsigned comment added by 174.52.14.15 ( talk) 04:50, 13 August 2013 (UTC)
I want to thank everyone. It is very interesting. - Alex 174.52.14.15 ( talk) 23:38, 14 August 2013 (UTC)
How do I choose the central atoms in ambiguous cases?
For the sake of argument, an example: H
2F+
- how would I decide between μ-fluorido-dihydrogen(1+), dihydridofluorine(1+), or dihydrogenfluorine(2 H—F)(1+)?
Plasmic Physics (
talk)
03:29, 12 August 2013 (UTC)
Is this a technically correct name for [Be]=B[Be]B1[Be]B([Be]B=[Be])[Be]1: di-μ-beryllido-1κB-bis(μ-beryllido-beryllido-2κB-diboron)? Plasmic Physics ( talk) 12:55, 12 August 2013 (UTC)
Or is it di-μ-beryllido-1:1ʹκ4Be-bis(μ-beryllido-beryllido-2κBe-diboron)? Plasmic Physics ( talk) 03:06, 16 August 2013 (UTC)
I am modeling a pressurized cylinder at high temperature, for which i have a creep rate equation (which involves hoop stress) to calculate hoop strain and it states that stresses in other directions are not important. Now i have to prepare a creep rate tensor (3x3 matrix). Can somebody tell me which components will be entered in the matrix and which will be zero? Brahmarishiraj ( talk) 04:23, 12 August 2013 (UTC)
>>Thank you for the effort, but i had that paper, could not get much from that. Brahmarishiraj ( talk) 07:09, 15 August 2013 (UTC)
In cases of breast cancer, depending on the surgeon's judgement, some or all of the armpit lymph nodes will be removed. This will reduce the effectiveness of fluid drainage of the arm on the affected side. Women are advised to not allow blood pressure to be checked on the affected arm. But if the woman some time later develops breast cancer in the other breast, she may lose the lymph nodes for the other arm as well. How does this affect the measurement of blood pressure, given that it is done by gradually inflating a cuff on an arm while listening for the aparent start and stop of the pulse? Is the high reading increased due to back pressure or something? Or do you get a false low reading from cutting off the perceived pulse early? 1.122.88.140 ( talk) 05:45, 12 August 2013 (UTC)
I read that the simple formula is Battery_capacity x Battery_type_coefficient / Charger_current_supply. But I couldn't find what coefficient I should use for Li-ion. Zarnivop ( talk) 09:16, 12 August 2013 (UTC)
what is the connection between the plasma of blood to plasma of television? 176.13.43.43 ( talk) 18:43, 12 August 2013 (UTC)
How can this every happen. I thought 100 F is a b-s joke at the tip of South America. But when I look at 42 F is the dew point, 14% humidity, a high temperature is possible. Is this possible a sudden spike jump in temperature in just one hour. The weather report said 7:00 PM is 53 F but 100 F is 8:00 PM but 9:00 PM is 51. Do 30-40 degree jump in temperature ever happens? Is this possible to start as 75 F at the midnight. At Southern hemisphere January is their summertime, at the high latitude can peak temperature happen at midnight hours, could it be due to constant daylight, and only 4 or 5 hours to release heat make peak temperatures occur at night hours. At low latitudes we never have peak temperature at night or midnight or sudden 20-30 F jump in just one hour.-- 69.226.33.213 ( talk) 20:27, 12 August 2013 (UTC)
Science desk | ||
---|---|---|
< August 11 | << Jul | August | Sep >> | August 13 > |
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 see such signs on American freeways. Why? My guess is because it is hard on the road? But I want to get a confirmation and perhaps an extended explanation why it is so.
Also why restricted? Why not prohibited? Is restricted the same as prohibited? I don't think so?
Thanks, - Alex 174.52.14.15 ( talk) 03:09, 12 August 2013 (UTC)
I've been under the impression that the engine braking involves the electrical generator. When the diesel fuel is cut off the truck moves forward under the gained momentum. The rotation of the wheels is eventually transferred to the generator which generates electricity that is stored in the rechargeable battery. The work invested in the process slows the truck down. The article quoted above does not mention this at all. — Preceding unsigned comment added by 174.52.14.15 ( talk) 04:50, 13 August 2013 (UTC)
I want to thank everyone. It is very interesting. - Alex 174.52.14.15 ( talk) 23:38, 14 August 2013 (UTC)
How do I choose the central atoms in ambiguous cases?
For the sake of argument, an example: H
2F+
- how would I decide between μ-fluorido-dihydrogen(1+), dihydridofluorine(1+), or dihydrogenfluorine(2 H—F)(1+)?
Plasmic Physics (
talk)
03:29, 12 August 2013 (UTC)
Is this a technically correct name for [Be]=B[Be]B1[Be]B([Be]B=[Be])[Be]1: di-μ-beryllido-1κB-bis(μ-beryllido-beryllido-2κB-diboron)? Plasmic Physics ( talk) 12:55, 12 August 2013 (UTC)
Or is it di-μ-beryllido-1:1ʹκ4Be-bis(μ-beryllido-beryllido-2κBe-diboron)? Plasmic Physics ( talk) 03:06, 16 August 2013 (UTC)
I am modeling a pressurized cylinder at high temperature, for which i have a creep rate equation (which involves hoop stress) to calculate hoop strain and it states that stresses in other directions are not important. Now i have to prepare a creep rate tensor (3x3 matrix). Can somebody tell me which components will be entered in the matrix and which will be zero? Brahmarishiraj ( talk) 04:23, 12 August 2013 (UTC)
>>Thank you for the effort, but i had that paper, could not get much from that. Brahmarishiraj ( talk) 07:09, 15 August 2013 (UTC)
In cases of breast cancer, depending on the surgeon's judgement, some or all of the armpit lymph nodes will be removed. This will reduce the effectiveness of fluid drainage of the arm on the affected side. Women are advised to not allow blood pressure to be checked on the affected arm. But if the woman some time later develops breast cancer in the other breast, she may lose the lymph nodes for the other arm as well. How does this affect the measurement of blood pressure, given that it is done by gradually inflating a cuff on an arm while listening for the aparent start and stop of the pulse? Is the high reading increased due to back pressure or something? Or do you get a false low reading from cutting off the perceived pulse early? 1.122.88.140 ( talk) 05:45, 12 August 2013 (UTC)
I read that the simple formula is Battery_capacity x Battery_type_coefficient / Charger_current_supply. But I couldn't find what coefficient I should use for Li-ion. Zarnivop ( talk) 09:16, 12 August 2013 (UTC)
what is the connection between the plasma of blood to plasma of television? 176.13.43.43 ( talk) 18:43, 12 August 2013 (UTC)
How can this every happen. I thought 100 F is a b-s joke at the tip of South America. But when I look at 42 F is the dew point, 14% humidity, a high temperature is possible. Is this possible a sudden spike jump in temperature in just one hour. The weather report said 7:00 PM is 53 F but 100 F is 8:00 PM but 9:00 PM is 51. Do 30-40 degree jump in temperature ever happens? Is this possible to start as 75 F at the midnight. At Southern hemisphere January is their summertime, at the high latitude can peak temperature happen at midnight hours, could it be due to constant daylight, and only 4 or 5 hours to release heat make peak temperatures occur at night hours. At low latitudes we never have peak temperature at night or midnight or sudden 20-30 F jump in just one hour.-- 69.226.33.213 ( talk) 20:27, 12 August 2013 (UTC)