SuzukiSavage.com - Super Powers...

Serowbot YaBB Moderator ModSquad Offline OK.... so what's the speed of dark? Posts: 28672 Tucson Az Gender:	Super Powers... 08/29/12 at 11:27:30 Well,.. they don't all make superheros,... but it's pretty cool... ... and it's another waste of 2 min of yer' life... ... ...
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gerald.hughes Serious Thumper ModSquad Offline FSO Posts: 1100 Tucson, Az Gender:	Re: Super Powers... Reply #1 - 08/29/12 at 13:26:00 So, how does he manage to draw dotted lines with a piece of chalk?
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bill67 Serious Thumper Offline old tired Posts: 8517 genoa city wisconsin Gender:	Re: Super Powers... Reply #2 - 08/29/12 at 13:44:39 He is pretty smart,He got the answers really fast.
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Super Powers... Reply #3 - 08/29/12 at 16:09:00 gerald.hughes wrote on 08/29/12 at 13:26:00: So, how does he manage to draw dotted lines with a piece of chalk? He pushes it at an angle that makes it chatter.
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Paraquat Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2206	Re: Super Powers... Reply #4 - 08/29/12 at 16:17:33 I bet his wife loves him. --Steve
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ToesNose Serious Thumper Offline Pardon me, do you have Hot Sauce? Posts: 1993 Mooresville, NC Gender:	Re: Super Powers... Reply #5 - 08/29/12 at 22:10:28 Thanks Serowbot, that's just what I needed to help me go to sleep
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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Super Powers... Reply #6 - 08/29/12 at 22:16:40 I have a math problem Ive never even tried to solve. A tire, rolling at 60 MPH, top of the tire is moving forward at 120 MPH, bottom, zero. Put a dot on the tire & graph its speed thru one revolution. Is that gonna be a sine wave? How different would the graph look with different tire diameters?
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Serowbot

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OK.... so what's the
speed of dark?

Posts: 28672
Tucson Az
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Re: Super Powers...
Reply #7 - 08/29/12 at 22:49:42

justin_o_guy2 wrote on 08/29/12 at 22:16:40:

I have a math problem Ive never even tried to solve.

A tire, rolling at 60 MPH, top of the tire is moving forward at 120 MPH, bottom, zero. Put a dot on the tire & graph its speed thru one revolution.
Is that gonna be a sine wave?
How different would the graph look with different tire diameters?

Nope,... straight as an arrow,.. but you'll end up with an 172ft long tire...
Prolly kinda' skinny... Huh

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Ludicrous Speed !... ... Huh

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Super Powers... Reply #8 - 08/29/12 at 23:21:34 The speed goes from zero to 120 mph & back to zero. The forward progress of that dot,, at the top & bottom, I can get it, at 90* on either side of the axle, 60 MPH, but that spot, the first few degrees as the dot comes up off the asphalt really gets me,
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Cavi Mike

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Re: Super Powers...
Reply #9 - 08/30/12 at 04:47:26

It will look like more like an AC wave that's been rectified but not a rectified sine wave either. In a rectified sine wave the "dot" is moving its fastest as it's approaching zero and slowest at its peak. It's the opposite in the weird wave you described - it's moving fastest at its peak and slowest at zero. It will look more like a lower-case 'm' than a rectified sine-wave.

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Super Powers... Reply #10 - 08/30/12 at 07:37:24 mmmmmmmm Yea,, it would, woodnitt? But where my head gets all scrambled is in the area where the dot is just coming up off the asphalt. Im really not following the rectified thing.. in school, after an ac wave went thru a rectumfrier it came out flat,
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Serowbot

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OK.... so what's the
speed of dark?

Posts: 28672
Tucson Az
Gender: male

Re: Super Powers...
Reply #11 - 08/30/12 at 08:10:00

justin_o_guy2 wrote on 08/29/12 at 22:16:40:

I have a math problem Ive never even tried to solve.

A tire, rolling at 60 MPH, top of the tire is moving forward at 120 MPH, bottom, zero. Put a dot on the tire & graph its speed thru one revolution.
Is that gonna be a sine wave?
How different would the graph look with different tire diameters?

JOG,... I'm missing something here...
If the top is moving 120mph, and the bottom zero,... the tire will never make one revolution, because the bottom isn't moving...
The tire isn't rotating,.. it's stretching... Huh

...

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Charon

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Re: Super Powers...
Reply #12 - 09/02/12 at 15:16:53

The curve is called a cycloid, or a cycloidal wave.

The AC sine wave, having passed through a half-wave rectifier, is a series of pulses interspersed with gaps of length equal to the pulses, each one half of a sine wave. Through a full-wave rectifier, it looks as if the "bottom" half of the sine wave was inverted and you get a series of pulses. It doesn't become "flat" until the power supply filter (usually a capacitor) acts on it.

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Eschew obfuscation.

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justin_o_guy2 Serious Thumper Offline What happened? Posts: 55279 East Texas, 1/2 dallas/la.	Re: Super Powers... Reply #13 - 09/03/12 at 03:01:42 Thanks Charon. Look what I learned,, thats cool, http://www.scitechantiques.com/cycloidhtml/ Drop a ball on a ramp & one on a cycloid ramp & the one that falls on the longer, curved ramp gets to the bottom first.
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Paraquat Serious Thumper Offline SuzukiSavage.com Rocks! Posts: 2206	Re: Super Powers... Reply #14 - 09/03/12 at 06:55:12 That's actually really interesting. --Steve
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