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Yargk's Avatar
 
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The 959 can really go (3/4) c, physics is fun

I just started my third year at Berkeley with the second semester of upper division electrodynamics as one of my classes. I knew the 959 was fast, but not this fast...



The book is "Introduction to Electrodynamics" by David Griffiths.

By the way, my electrodynamics teacher drives an S2000 and my lower division mechanics teacher kept using Porsche stuff as examples. He would show a diagram of a 4-cam carrera motor to show the torque ratings and he later told us to look under our turbo carreras to see what a torsion spring looks like. Luckily, I could actually do this, which greatly aided my studies.

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Old 09-08-2003, 06:11 PM
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Doesn't the 959 have bulletproof glass .........
Old 09-08-2003, 06:18 PM
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I would think it would have to . . . to be going .75c.
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Old 09-08-2003, 06:59 PM
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I don't know, my speedometer only goes to .00005 c
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Old 09-08-2003, 07:19 PM
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Just reading that question makes my head ache. Aye Carumba, thank God I'm long done with College!
Old 09-08-2003, 07:26 PM
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Quote:
Originally posted by Tyson Schmidt
I don't know, my speedometer only goes to .00005 c
Dang! . . .thats 33530.8 mph!
Oh wait, maybe thats because I'm see you from the train leaving Boston at . . .uh . .what was the question?
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Old 09-08-2003, 07:40 PM
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Yeah, what time does Oxford Station arrive at this train?
Old 09-08-2003, 07:46 PM
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Quote:
Originally posted by island911
I would think it would have to . . . to be going .75c.
Sorry, I'm in physics theory mode, let me switch to engineering mode and I'll give you decimals.
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Old 09-08-2003, 07:50 PM
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Quote:
Originally posted by island911
Dang! . . .thats 33530.8 mph!
Oh wait, maybe thats because I'm see you from the train leaving Boston at . . .uh . .what was the question?
Well no wonder it wasn't registering. I thought the cable broke. I guess a trip to No. Ho. Speedo is in order.
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Old 09-08-2003, 08:20 PM
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Ah yes..the 4-cam Carreras.....the original Carreras born way before 911s were conceived.
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186,000 MPS.....not just a good idea....its the Law!

"Too much of everything is just enough"
Old 09-08-2003, 08:25 PM
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My favorite physics prof drove a 356 coupe. Got to believe that they like and understand good engineering.

And why is 0.75c only 33530 mph?

c = speed o' light = 186000 mps = 669,600,000 mph.
0.75c = 502,200,000 mph.

Island is way to smart so what did I miss?
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Last edited by arcsine; 09-08-2003 at 08:39 PM..
Old 09-08-2003, 08:36 PM
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Man I miss engineering school. It was hard, but beats working for a living . MEs always had better examples with Porsches and all. The closest I ever got as an EE was a controls prof who used his 67 Beetle as examples controls systems. Lots of fun figuring out the Laplace transform of the transfer function of the fuel pump of a 67 VW. Good times. We never got suspension examples for spring/damper systems, though. They turned them into RLC circuits for the mechanically impaired EEs.
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Last edited by jazzbass; 09-08-2003 at 10:20 PM..
Old 09-08-2003, 08:38 PM
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I'll take a stab at it.
A)Yes, bullet speed = .83c
B)No, bullet speed = .71c
Old 09-08-2003, 08:39 PM
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Quote:
Originally posted by Gary Carlton
My favorite physics prof drove a 356 coupe. Got to believe that they like and understand good engineering.

And why is 0.75c only 33530 mph?

c = speed o' light = 186000 mps = 669,600,000 mph.
0.75c = 502,200,000 mph.

Island is way to smart so what did I miss?

You missed the fact that he was responding to my .00005c speedometer post, not the .75c part.
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Old 09-08-2003, 08:45 PM
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GO BEARS!!!!!

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(Class of '86)
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Old 09-08-2003, 09:23 PM
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Actually your speedo reads 5.0x10^-5 c. Everybody knows you've gotta use Sci notation.

and of course you'd have to say

c = 6.696 x 10^8 mph
and
.75c = 5.022 x 10^8 mph

and if we really wanted to get nit-picky we'd make you put it in m/s

c = 2.9946 x 10^8 m/s
.75c = 2.246 x 10^8 m/s

jeez, using miles per hour

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Old 09-08-2003, 10:20 PM
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All answers are clearly wrong: the wrongdoers would never, never use a 959: too rare and too expensive, and it just doesn't look right for wrongdoers to drive a Porsche, needs to be some red car...
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Old 09-08-2003, 11:24 PM
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Clearly a flawed question; both cars are 959s, yet the cop car is 1/4c slower than the getaway car
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Old 09-08-2003, 11:40 PM
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Its obvious why the cop car is slower...that light on top and Kojak ouf the window is bound to affect the aerodynamics of the car...bald head or not.
Old 09-09-2003, 12:19 AM
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Quote:
Originally posted by Langers
Clearly a flawed question; both cars are 959s, yet the cop car is 1/4c slower than the getaway car
Maybe the getaway car had extra power from the factory, like the 550bhp car AutoClassica in the UK has for sale

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Old 09-09-2003, 01:32 AM
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