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  #21  
Old 08.09.2011, 16:00
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Re: Falling Satellite

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How was life without microprocessors?
Fine, thanks

We had proper computers in those days






Interdata 50 sequence, anyone?
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  #22  
Old 08.09.2011, 17:37
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Re: Falling Satellite

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Some seriously dodgy science there, m'boy
Ahem, what ? When did I write that ?
I have no memory of writing that post.
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  #23  
Old 09.09.2011, 01:03
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Re: Falling Satellite

What goes up has to come down
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  #24  
Old 09.09.2011, 13:48
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Re: Falling Satellite

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What goes up has to come down
.....except for the price of fuel!!
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  #25  
Old 22.09.2011, 23:42
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Re: Falling Satellite

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Heads Down, Look Up!!!


It's a-coming down tomorrow night (Friday 23rd) into the Southern Ocean, or so they reckon
.
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Old 23.09.2011, 01:10
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Re: Falling Satellite

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<Geek hat on>
Well...not quite. The acceleration depends on many other things and is limited by the mass of the falling object, the height and the acceleration by the pulling object (earth in this case).

Considering a CS area of roughly 0.5 sqm and a mass of 532 kg, drag coefficent of about 2 (assuming it is a box type thingy) a density of 1.5 kg/cu meter and gravity of 1 g...

Max velocity reached would be around 83.4 m/s.
For comparison, an airplane has a velocity of about 272.22 m/s.

The kinetic energy of the said object (mass * acc. by gravity * height) would be roughly 1.85 x 10^6 joules.
For comparison, 1 g of TNT has 4.184×10^3 Joules. So almost like a kilo of TNT.
<Geek hat off>
Wow !!!
You must be an Indian!!
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  #27  
Old 23.09.2011, 01:19
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Re: Falling Satellite

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Wow !!!
You must be an Indian!!
What, you say that just because someone proposes a solution based on invalid initial assumptions, struggles to apply flawed logic and dodgy maths, and ends with a spectacularly wrong conclusion?


Naw, it could have been written by virtually any Business Analyst in the world
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  #28  
Old 23.09.2011, 01:54
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Re: Falling Satellite

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What, you say that just because someone proposes a solution based on invalid initial assumptions, struggles to apply flawed logic and dodgy maths, and ends with a spectacularly wrong conclusion?


Naw, it could have been written by virtually any Business Analyst in the world
As opposed to someone who just writes a witty comment and does nothing.

That could be done by any Manager in the world.
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Old 23.09.2011, 02:34
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Re: Falling Satellite

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As opposed to someone who just writes a witty comment and does nothing.

That could be done by any Manager in the world.
Fair enough. I'll give you some hints.
  • You assumed the satellite is dropping vertically, so its energy would be given by

  • The satellite has had a semimajor orbital axis of 600km, so has been travelling at 7km per second,
    hence its kinetic energy () dwarfs the potential energy of the vehicle.

  • At hypersonic speeds, a reasonable CD would be closer to 1 than 2.

  • As the vehicle reenters, components and sections will burn away, constantly reducing cross-sectional area.

  • Lastly - as should be pretty obvious by now - the vehicle will be decelerating, not accelerating.

Thus armed, and as A Good Manager should, I'll leave you to rework your calculation, rather than do your job for you
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  #30  
Old 23.09.2011, 02:36
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Re: Falling Satellite

Well as I am the EF's "Our Man in America", I'll keep a lookout for it over here.
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  #31  
Old 23.09.2011, 07:34
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Re: Falling Satellite

The sky is falling, the sky is falling !!
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  #32  
Old 23.09.2011, 07:47
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Re: Falling Satellite

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Wow !!!
You must be an Indian!!

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  #33  
Old 23.09.2011, 07:53
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Re: Falling Satellite

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I remember something like this when I was a wee lad in 1st grade

...... and I remember this, long before that flying submarine:

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  #34  
Old 23.09.2011, 08:43
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Re: Falling Satellite

OMG OMG OMG EVERYONE PLEASE PANIC!

According to the big titles on the 20 min today, the satellite is out of control and threatening Switzerland!!!!!!! Good thing that construction rules demanded the including of a bunker on every building till the 90's!


*is packing her satellite searching team. I need me a new sculpture*
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  #35  
Old 23.09.2011, 08:51
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Re: Falling Satellite

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OMG OMG OMG EVERYONE PLEASE PANIC!

According to the big titles on the 20 min today, the satellite is out of control and threatening Switzerland!!!!!!! Good thing that construction rules demanded the including of a bunker on every building till the 90's!


*is packing her satellite searching team. I need me a new sculpture*
Now we really do need International Rescue

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  #36  
Old 23.09.2011, 09:03
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Re: Falling Satellite

You can't say that these marketing people are always out of touch with reality:

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  #37  
Old 23.09.2011, 09:06
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Re: Falling Satellite

I was listening to the radio in my car this morning, and they said there's 1 chance in 3200 that pieces of the satellite will hit someone on the head... I'm staying indoor today
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  #38  
Old 23.09.2011, 09:07
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Re: Falling Satellite

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I was listening to the radio in my car this morning, and they said there's 1 chance in 3200 that pieces of the satellite will hit someone on the head... I'm staying indoor today
I might fake some party invitations for my boss at walking distance ...
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  #39  
Old 23.09.2011, 09:14
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Re: Falling Satellite

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Now we really do need International Rescue

This is not a job for kids We need to send people who know what they're doing

Attachment 32810

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  #40  
Old 23.09.2011, 09:16
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Re: Falling Satellite

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OMG OMG OMG EVERYONE PLEASE PANIC!

According to the big titles on the 20 min today, the satellite is out of control and threatening Switzerland!!!!!!! Good thing that construction rules demanded the including of a bunker on every building till the 90's!


*is packing her satellite searching team. I need me a new sculpture*
I found the reason for the public not to touch any remnants much more alarming - according to the Alarmzentrale/panic ministry:

"Due to the rapid impact some pieces may have sharp edges"

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