Rev about?

Is this:http://www.iflscience.com/physics/faster-journey-center-earth in fact the conclusion you came to based on similar modelling of non-uniform density?

I meant of course this this

So, falling through the centre of the Earth from midlands Tasmania, it would take me 38 minutes to end up drowning in the middle of the Atlantic.

Thanks Martin.

Just as well I’m not a physicist, otherwise their statement that these guys went where no physicist has been before would be demonstrably wrong.

Here are my calcs:

https://newtonexcelbach.wordpress.com/2010/07/08/the-hole-through-the-middle-of-the-earth-%e2%80%93-revised-transit-time/

I found 19 min 28.5 sec to the centre, so 38 min 59 sec all the way.

I’ll have a closer look at the article and see if I can find some information about what densities they used.

Well done Rev.

It seems there is a paper available, but the publishers want nearly $40 for it, so I’m afraid I will be sticking with my guessed densities.

Now all you have to do is tender for the engineering contract.

Love me tender

would you oscillate from one side to the other?

CrazyNeutrino said:

would you oscillate from one side to the other?

Only if you miss the grab handles on the other side.

CrazyNeutrino said:

would you oscillate from one side to the other?

With a perfect vacuum and frictionless sides, yes.

The Rev Dodgson said:

Thanks Martin.

Just as well I’m not a physicist, otherwise their statement that these guys went where no physicist has been before would be demonstrably wrong.

Here are my calcs:

https://newtonexcelbach.wordpress.com/2010/07/08/the-hole-through-the-middle-of-the-earth-%e2%80%93-revised-transit-time/

I found 19 min 28.5 sec to the centre, so 38 min 59 sec all the way.

I’ll have a closer look at the article and see if I can find some information about what densities they used.

:) Wished I kept my old calculations. I was then able to show that the time through the Earth to the far side was identical to the time to orbit to the far side. I don’t remember what I assumed for density.

mollwollfumble said:

The Rev Dodgson said:

Thanks Martin.

Just as well I’m not a physicist, otherwise their statement that these guys went where no physicist has been before would be demonstrably wrong.

Here are my calcs:

https://newtonexcelbach.wordpress.com/2010/07/08/the-hole-through-the-middle-of-the-earth-%e2%80%93-revised-transit-time/

I found 19 min 28.5 sec to the centre, so 38 min 59 sec all the way.

I’ll have a closer look at the article and see if I can find some information about what densities they used.

:) Wished I kept my old calculations. I was then able to show that the time through the Earth to the far side was identical to the time to orbit to the far side. I don’t remember what I assumed for density.

I came up with that as well. That’s for constant density, so the motion through the hole is simple harmonic.

I also tied it in with Euler’s formula for the buckling load of a column, which I thought was pretty neat.

I got a message from Alex Klotz himself on my blog.

Also a link to a free (pre-publish) version of the original paper.

https://newtonexcelbach.wordpress.com/2015/03/26/falling-faster/

The Rev Dodgson said:

I got a message from Alex Klotz himself on my blog.

Also a link to a free (pre-publish) version of the original paper.

https://newtonexcelbach.wordpress.com/2015/03/26/falling-faster/

Nice one, Rev :)

how is it that you are the 4th dougaj registered on your own blog?

that’s kind of cool ;) well done rev

diddly-squat said:

how is it that you are the 4th dougaj registered on your own blog?

I didn’t know I was.

Where does it say that?

The Rev Dodgson said:

diddly-squat said:

how is it that you are the 4th dougaj registered on your own blog?

I didn’t know I was.

Where does it say that?

sigh

dougaj4

diddly-squat said:

The Rev Dodgson said:

diddly-squat said:

how is it that you are the 4th dougaj registered on your own blog?

I didn’t know I was.

Where does it say that?

sigh

dougaj4

dougaj1-3 are sock puppets ala Omega4 :) check the comments

diddly-squat said:

The Rev Dodgson said:

diddly-squat said:

how is it that you are the 4th dougaj registered on your own blog?

I didn’t know I was.

Where does it say that?

sigh

dougaj4

Ah I see.

The reason is buried in the distant past, before blogs even existing and when google was young.

Dropbear said:

diddly-squat said:

The Rev Dodgson said:

I didn’t know I was.

Where does it say that?

sigh

dougaj4

dougaj1-3 are sock puppets ala Omega4 :) check the comments

I’ve got a plan so cunning, you could put a tail on it and call it a weasel