In a thunderstorm, static electricity generated on the ground thundercloud "induced charge", causing the cloud base is negatively charged, positively charged surface of the case. According to the characteristics of the conductor surface charge distribution, density and strength of the electric field of the charge related to the radius of curvature of the surface of the conductor is related to the radius of the smaller (that is, the sharper), charge density with higher field strength (see right), therefore, Towering sharp object on the surface charge becomes centralized location, where the electric field generated by strong compared to the surrounding, and the most likely to cause at Lightning. So when the big thunderstorm, video ezy towering objects such as flagpoles, video ezy trees, towers, chimneys, telephone poles, etc., will become the lightning channel, which is why the next thunderstorm, we are always warned never stood on the broad plains, because relative to the air, the person is a good conductor, easy to charge and guided by lightning.
Aircraft in flight may also have been struck by lightning, but there is no way the aircraft grounded lightning rod installed, what to do? In fact, a passenger on the plane does not have to worry about this problem, because when the metal shell of the aircraft struck by lightning, the charge will be moved to the exclusive power of even the smallest metal surface, but there will not be a charge inside the fuselage, so the internal electric field must be zero (see note). Nevertheless, the aircraft struck by lightning may still be due to strong video ezy currents make the body to overheat video ezy and local deformation or meltdown; magnetic currents formed, will also affect the electronic device video ezy on the machine, and still have some of the flight safety risks. In order to reduce the hazards of lightning, the wing trailing aircraft will means static brush (see right), rear fuselage will usually installed by point discharge principle, to release the charge due to air friction generated by the cabinet. Tip of the metal tends to attract a charge, but also easy to charge, video ezy when the charge is due to the release of the cabinet is reduced, we can greatly reduce the intensity of lightning, also be able to slow down the aircraft suffered damage caused by lightning. In other words, static brushes with different lightning rod, it is mainly aimed at the release of the charge to reduce the intensity of lightning. In addition, some cars will be on the back end bumper device can drag a line on the ground static brush, but also to eliminate excess static video ezy charge, this way, in dry weather in the car door, you can reduce the possibility of electric shock (see right). Each will be accompanied by tremendous energy generated by lightning, although our understanding of lightning is still very limited, however, to avoid a variety of currently developed by lightning or decrease the intensity of lightning technology, has been sufficient to protect the majority of people's lives, lightning is no longer video ezy so have threat. Note: The metal shell internal electric field must be zero, by the metal shell of the applied electric field of a simple example to understand. When an electric field is applied to the metal shell (as shown by the blue arrow), while the metal shell will be induced positive and negative charge, video ezy a positive charge to the same direction of movement and the direction of the electric field, the negative charge on the contrary; mobile charges in the metal shell Internal and external electric field to establish a new offset field (shown in red arrows), and therefore the electric field inside the metal shell is zero. Metal Shell internal electric field must be zero, by the metal shell of the applied electric field of a simple example to understand. video ezy When an electric video ezy field is applied to the metal shell (as shown by the blue arrow), while the metal shell will be induced video ezy positive and negative charge, a positive charge to the same direction video ezy of movement and the direction of the electric field, the negative charge on the contrary; mobile charges in the metal shell Internal and external electric field to establish a new offset video ezy field (shown in red arrows), and therefore the electric field inside the metal shell is zero.
Blog Post Search suicide prevention help depression pipeline unit address at the phone. Suicide Prevention Center, Department of Health advisory 0800-788995 Zhang Foundation Room 401, 219 Songjiang Road in Taipei video ezy http://www.1980.org.tw 02-25025858 (Rep) or dial short code 1980 John Tung Foundation, Taipei 3 http://www.jtf.org.tw 02-27766133 turn 57 on the 12th floor of the 21 to 25 Fuxing Road, Taipei City, Taipei Association lifeline Songjiang Road No. 65, 11th Floor http://www.sos.org.tw http://www.lifeline.org.tw 02-25059595 1995 92 (Taiwan simply dial Line) Mackay Mackay video ezy Society peace talks center line in the mountains Zhongshan North Road, Taipei, 9th Floor, No. 2 segment 02-2531050502 -25318595 to give yourself a chance to commit suicide advice line: 0800-788995 (24 hours) lifeline: 1995 Teacher Line: 1980
Article archive December 2014 (3) November 2014 (1) October 2014 (7) 2014 1998 (20) August 2014 (27) July 2014 (12) June 2014 (3) 2014 May ( 19) April 2014 (21) 2014 1999 (5) February 2014 (13) January 2014 (4) December 2013 (8) November 2013 (2) 2013 1998 (7) 2013 August ( 18) July 2013 (16) June 2013 (14) 2013 May (11) April 2013 (2) 2013 1999 (3) February 2013 (4) January 2013 (3) December 2012 (3 ) November 2012 (2) October 2012 (3) August 2012 (4) 2012 July (2) June 2012 (6) 2012 1999 (4) 2012 1999 (3) February 2012 (4) January 2012 (2) 2011 December (2) November 2011 (3) October 2011 (1) 2011 1998 (3) 2011 August (2) July 2011 (4) June 2011 (5) May 2011 (5) 2011 1999 (6) 2011 1999 (21) February 2011 (4) January video ezy 2011 (2) 2010 December (2) November 2010 (4) October 2010 (4) September 2010 (7) August 2010 (8) July 2010 (4) May 2010 (5) April 2010 (13) 2010 1999 (20) February 2010 (5) 2010 January (13) 2009 ten February (7) November 2009 (9) in October 2009 (21) 2009 1998 (8) 2009 August (32) July 2009 (20) June 2009 (8) 2009 May (9) 2009 four month (29) March 2009 (11) February 2009 (18) January 2009 (16) December 2008 (22) November 2008 (42) October 2008 (22) September 2008 (32) 2008 eight month (27) July 2008 (23) June 2008 (8) May 2008 (20) April 2008 (40) March 2008 (36) February 2008 (20) January video ezy 2008 (19) December 2007 (21) November 2007 (31) October 2007 (15) September 2007 (19)
Typhoon 2014 (2) Taiwan edible oils (11) Eco-film (3) strange summer 2014 (1) Space Development (34) Kaohsiung gas explosion (9) the Ebola virus (11) Life Science (4) Science notes (9) Science History (11) Taiwan Nuclear (7) touching video ads (7) Bee Ecology video ezy (4) Ecology (14) small experiment (2) Acupuncture (2) Taiwan People (25) Biotechnology (22) Arctic polar vortex turbulence (7) 2013-7-06 Born Baby Bear Cat (5) 2013 Rabies (15) 2013 typhoon Taiwan (3) bird flu and swine flu (8) asteroid (6) tornado (2) food to fill additional material video ezy (8) Summer ( 1) 2013-2-15 Russia meteorite (2) 2012Curiosity rover (2) 2011.3.11 Japan 8.9 (25) 2010 earthquake volcano (1) Iceland volcano (7) Traditional Chinese Medicine (4) Education (5) 99304 Jiasian earthquake (9 ) Astronomy (6) photosynthesis History of Science video ezy (6) 219 (1) strengthen 3 (6) 98 307 (12) Morakot (6) daily in English (7) to Section (118) of teaching (83) Hadron Collider (1) counseling rooms experimental course (44) biological information (178) Chemistry (41) Physics (51) Room (72) Natural topic (5) Music (5) Jun Bo ㄧ laugh (3) 96-301 graduating class of information ( 4) The new concept (33) Uncategorized Articles (14)
No comments:
Post a Comment