David Custis Kimball - blog
You: Why Dave; why now?
Me: Well, I've a two talented kids; the younger said, 'Stop with the lectures.' Then asked, 'Dad, can I help you set up a blog?' Moments later, Me: 'OK, that's a great idea, thinkin' they might just read it someday.
me ---> 'Gaarr of Blog' <---
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An Unmapped Ponderocity:
To say: '"He is a man of truth," is to say nothing; to say: "He is a man of of," is to state an elementary truth of logic.'
Winston Davids, 1969 - Trinity College Valedictorian - 1970; known endeavor: actuarial contributions to The Donald; since has contacted me and sadly is quite ill. Ask prayers for recovery; thanks for his brilliance and music.
| website-hit-counters.com |
Aug 28, 2009
7:04pm
Science, Physics A difficult bronc to rope, as it seems in that view from the hayfield. Lightning is always most dangerous before the rain starts… the front edge has many fewer places to ground as the rain provides almost infinite paths. I’m really surprised that scientists ‘don’t know’ the lightning process. If it is ice crystals, that means cold, dry air and perhaps the crystals can store the charge on their complex surfaces until one goes and like dominoes or mousetraps, they all follow in a ‘nuclear’ release of directed force.This spectacular image shows the awesome moment when a 300,000 volt bolt of lightning tore open the night sky.
The branches on the lightning bolt appear thinner. In fact, they are simply less bright.
The digital camera was unable to cope with the brightness of the main streak and turned it into a thick blurry line.
Lightning is the discharge of electricity from clouds. A bolt can travel at speeds of 130,000mph and – for a few millionths of a second - it produces one million, million watts of power.
It can heat up the surrounding air to 55,000f – five times hotter than the surface of the Sun.
It is triggered when electrical charges build up in storm clouds.
Scientists are unsure what causes this build-up but believe it may be caused by the movement of ice crystals.
Once the charge is powerful enough, an invisible flow of electrons flows from the cloud to the ground in a zig-zag pattern.
As it approaches the ground, positively charged particles are attracted upwards. It is this current, called the return stroke, that appears as a bright flash.
Heat from lightning causes the air around it to expand rapidly – creating a dramatic crash of thunder.
source
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