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Posts Tagged ‘Lightning’

Zeus

Remember a long, long time ago when I wrote a teensy little bit about lightning?  Of course you don’t.

But seeing that we’re now studying electric charge, I will in fact expand on that ancient post.  Electrons flow from negatively charged objects to positively charged ones and lightning is an example of this.  Lightning transfers a very large amount of charge from a cloud to another cloud or to the ground. 

During this, the overall charge of the system is kept constant even though the cloud itself is now electrically neutral.   A bolt of lightning contains about 23C of charge and heats nearby air to about 10,000°C.  With all that technical stuff aside, lightning is just awesome to see. 

I know I had a better mini-video of lightning somewhere…the one below is horrible since it was taken with a cell phone camera. :/  You can’t even see anything unless you don’t blink for half a minute and stare with your nose pressed up against the screen…so I suggest you don’t try at all.

Instead, I shall supply you with a lovely picture off the web!

lightning.jpg

Happy sleepless exams/debate week!  At least you have an unlikely chance of being struck down by Zeus. : )

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So after nearly five hours stuck in a classroom taking the SAT, I promptly went home and slept for another five hours…I stick to my claim that standardized testing is a soporific drug.  (But at least I’ll never have to take it again!)

And since an analog clock is an impeccable example of uniform circular motion, it’s possible to calculate many, many things. : )

For one, the angular displacement for any hand of the clock over this 10-hour block of time would be 20π rad.  As for angular velocities, the measures would be -π/30 rad/s for the second hand, -π/1800 rad/s for the minute hand,           and -π/21600 rad/s for the hour hand.

Clocky!

And then at night, it started raining and thundering. ^ ^  Most beautiful thing ever.  Lightning occurs as a result of the electrical current flowing between the Earth and storm clouds (in which electrostatic charge has been building up).  That’s really all I know right now.  But…after learning more about electromagnetism, I shall expand on this. : )

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