Friday conumdrum with DDD - The twin paradox, help!

Will Snow

http://www.smbc-comics.com/index.php?db=comics&id=1576

ive got hundreds of these haha

EKE_38BPM

Keep 'em coming.

And share any interesting cycling stories (like the time I advised someone to grease their rims" on my "Once Bitten, Twice Shy" thread.

PBo

EKE_38BPM wrote:

Will, are you deliberately trying to open a can of worms. I get the feeling antontordy might be a creationist, or even worse, a believer in 'intelligent design'.

i would say it's impossible to read the comments of some of the posters on Bikeradar, and still believe in "intelligent design"..........."seriously flawed design", more like!

EKE_38BPM

PBo wrote:

EKE_38BPM wrote:

Will, are you deliberately trying to open a can of worms. I get the feeling antontordy might be a creationist, or even worse, a believer in 'intelligent design'.

i would say it's impossible to read the comments of some of the posters on Bikeradar, and still believe in "intelligent design"..........."seriously flawed design", more like!

BLASPHEMER!!!

Kieran_Burns

EKE_38BPM wrote:

PBo wrote:

EKE_38BPM wrote:

Will, are you deliberately trying to open a can of worms. I get the feeling antontordy might be a creationist, or even worse, a believer in 'intelligent design'.

i would say it's impossible to read the comments of some of the posters on Bikeradar, and still believe in "intelligent design"..........."seriously flawed design", more like!

BLASPHEMER!!!

Are there any women in here?

tailwindhome

PBo wrote:

EKE_38BPM wrote:

Will, are you deliberately trying to open a can of worms. I get the feeling antontordy might be a creationist, or even worse, a believer in 'intelligent design'.

i would say it's impossible to read the comments of some of the posters on Bikeradar, and still believe in "intelligent design"..........."seriously flawed design", more like!

Or as Dara O Brien puts it -

Look in the mirror, does that look like it was made in the image of god.

jonginge

Beeb2 @9pm:
Horizon: What Happened Before the Big Bang?

Gonna have to cycle really, really, really fast to make it home

Will Snow

i have never trusted anything that has been on horizon. pseudo science at its best in my opinion

jonginge

Agreed, I guess that's where the market is, though. Occasionally they do one on a subject that interests me

Will Snow

true, just needs to be taken with a massive grain of salt. Annoys me when people cite horizon as scientific evidence, when a cursory glance at a scientific journal would suggest otherwise.

Bugly

antontordy wrote:

Take the case of twins one of whom leaves Earth travelling at the near speed of light. As he would be returning to Earth, all that mattered would be the length of time he spent away from Earth which would be eqivalent to the length of time his brother spent awaiting his return. As the two periods would be the same, this would mean that their ages would be the same on return to Earth.

The issue is the return to earth, SR breaks down as outside forces are applied to deaccellerate, accellerate and deaccellerate the 'travelling' twin. My physics is several decades old and only from undergrad level but I believe that GR steps in when accelleration is applied.

According to SR as both twins in at rest in their framework both would see the 'other twin' as being younger. Thats the paradox, it breaks down once the twin in the rocket applies thrust and slows down his frame of reference.

Will Snow

special relativity works in this case, but its just very difficult maths to factor in the acceleration and deceleration; when you do the paradox is solved. I dont believe that counts as general relativity. But the other points in your post are exactly right

jimmypippa

Will Snow wrote:

sorry, i am terrible when it comes to trolls. I shall stop.

Back to the puns then?

http://xkcd.com/386/

DonDaddyD

JonGinge wrote:

Beeb2 @9pm:
Horizon: What Happened Before the Big Bang?

Gonna have to cycle really, really, really fast to make it home

You can't see the irony, no?

Answered you're own question maybe?

jonginge

DonDaddyD wrote:

JonGinge wrote:

Beeb2 @9pm:
Horizon: What Happened Before the Big Bang?

Gonna have to cycle really, really, really fast to make it home

You can't see the irony, no?

Answered you're own question maybe?

Put in a smiley maybe

Will Snow

jimmypippa

you can never quote xkcd enough