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Google and Rescue Operation

What was the last thing you searched for online? Why were you looking for it?
Photographers, artists, poets: show us SEARCHING.

lightning

The last search that I did on google was to find out how lightning strikes occur and if it is possible to harness this power to produce energy. We had heavy rain and thunderstorms yesterday and that prompted my search on this topic.

Singapore being close to the equator has frequent lightning during thunderstorms. It was interesting to know that lightning occurs  intra-cloud, from one cloud-to-another cloud and from cloud to the ground. An electrically charged plasma channel is produced in the surrounding air making the air a conducting path for the lightning.

The lightning travels downward in leaders and can initiate upward streamers from the  ground. Because the electrostatic discharge of terrestrial lightning superheats the air to plasma temperatures along the length of the discharge channel in a short duration, kinetic theory dictates gaseous molecules undergo a rapid increase in pressure and thus expand outward from the lightning creating a shock wave audible as thunder.

Lightning rods were originally developed by Benjamin Franklin. A lightning rod is very simple — it’s a pointed metal rod attached to the roof of a building. The rod might be an inch (2 cm) in diameter. It connects to a huge piece of copper or aluminum wire that’s also an inch or so in diameter. The wire is connected to a conductive grid buried in the ground nearby. Lightning rods provide a low-resistance path to ground that can be used to conduct the enormous electrical currents when lightning strikes occur. If lightning strikes, the system attempts to carry the harmful electrical current away from the  structure and safely to ground.  If the strike contacts a material that is not a good conductor, the material will suffer massive heat damage. The lightning-rod system is an excellent conductor and thus allows the current to flow to ground without causing any heat damage.

(References: Wikipedia, How Stuff works)

Other interesting posts in this category:
1) http://basicallybeyondbasic.wordpress.com/2013/11/06/daily-prompt-google-and-rescue-operation/
2) http://terry1954.wordpress.com/2013/11/06/daily-prompt-google-and-rescue-operation/
3) http://noncitygirl.wordpress.com/2013/11/07/googling/
4) http://emotionalfitnesstraining.com/2013/11/06/last-search/
5) http://youarethepassenger.wordpress.com/2013/11/06/daily-prompt-google-and-rescue/
6) http://adityaviyer.com/2013/11/06/google-and-rescue-operation/
7) http://adorablyobnoxious.wordpress.com/2013/11/06/daily-prompt-google-and-rescue-operation/
8) http://writethroughlife.wordpress.com/2013/11/07/daily-prompt-searching/
9) http://gawoman45.wordpress.com/2013/11/06/google-look-up/
10) http://flowersandbreezes.wordpress.com/2013/11/06/the-google-help/

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