409 reputation
38
bio website
location Duluth, MN
age 30
visits member for 1 year, 11 months
seen Mar 31 at 19:00

2011/09/28: Working at my 2nd software-development job full time and working on my 1st web-site and spending time with my wife an baby girl in my free time. I look forward to the day where my "full time" becomes my "free time".


Dec
12
awarded  Popular Question
Aug
8
comment Magnetic Levitation For Space Travel
Thanks for the answer. For the time calculations, I was using the "Long Relativistic Journeys" portion from this page for 4.2 ly and multiplying by 2 for the return trip. For the acceleration, yes you still accelerate, but I was thinking that ideally every atom in your body would accelerate equally 149 G's by the "levitation" forces so that you'd only feel 1 G of the 150 G's you actually accelerate at. Obviously getting every atom to participate is the trouble...
Aug
7
asked Magnetic Levitation For Space Travel
May
30
answered What is the Earth truly rotating about/revolving around?
May
10
awarded  Yearling
Mar
28
awarded  Notable Question
Mar
28
awarded  Good Question
Mar
27
awarded  Popular Question
Mar
27
comment How long can you survive 1 million degrees?
@JoeZeng Done, thanks for the suggestion!
Mar
27
awarded  Nice Question
Mar
27
asked How long can you survive 1 million degrees?
Jan
11
awarded  Scholar
Jan
11
accepted How is the speed of light constant in all directions for all observers?
Jan
11
comment How is the speed of light constant in all directions for all observers?
Very interesting, thanks much for the response!
Jan
11
comment How is the speed of light constant in all directions for all observers?
Nevermind, I've updated my question notes with the Lorenz Transform. From this, it appears time observed at a point in space is warped according to the direction of relative travel. For example, at the time of the Pulse, BoxGuy's mirror is at $(d,0)$, which maps to PlatGirl's $(\frac{2\sqrt{3}}{3}d, \frac{\sqrt{3}}{3}d/c)$. Thus, PlatGirl observes a current version of BoxGuy (for them both), but BoxGuy's "current" mirror is a future version of PlatGirl's "current" mirror. By symmetry, if the mirror and origin were reversed, PlatGirl's mirror would be the "future" one. Is this correct?
Jan
11
revised How is the speed of light constant in all directions for all observers?
added 816 characters in body
Jan
11
comment How is the speed of light constant in all directions for all observers?
Ok, so we set the space-time-origin (0,0) to Pulse at the Light for both BoxGuy and PlatGirl. The space-origin "moves" with the Light for BoxGuy, but is fixed relative to the platform for PlatGirl. At (d,d/c) and (0, 2d/c) for BoxGuy, Reflect and Return happen respectively. What is the formula for translating these space-time coordinates directly back to PlatGirl's coordinate system?
Jan
11
comment Acceleration of two falling objects with identical form and air drag but different masses
@MarkEichenlaub: That is true when air resistance is the driving force (e.g. The balloon is moving upwards at close to or past its terminal velocity speed), but that is not the case when the balloon is moving upwards at slower speeds (where gravity is the driving force). I have added this clarification to my answer.
Jan
11
revised Acceleration of two falling objects with identical form and air drag but different masses
Added clarification for my statement regarding the relative downward accelerations when both balloons are moving upwards.
Jan
10
revised How is the speed of light constant in all directions for all observers?
Added note about d being different