DaveC426913's latest activity
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DaveC426913 reacted to Al_'s post in the thread Writing: Read Only Have we found an ancient space habitat? with
Haha.
Yeah, but they just talk about unicorns. Oops, I didn't mean to end the thread. I like to talk about things that actually could be... -
DaveC426913 replied to the thread Collection of Lame Jokes.In Hamilton we like our puns, and our Timmy's Coffee. This downtown puddle has persisted across several years and has become... -
DaveC426913 replied to the thread Collection of Lame Jokes.That's one of ours here in Hammtown! We had a plow naming contest a few years ago. Many entries are Hammtown references. Chillin'... -
DaveC426913 replied to the thread Writing: Read Only Have we found an ancient space habitat?.Maybe they like living inside things. The reasons are myriad. Maybe they aren't planning a trip. Both of the above require insight... -
DaveC426913 replied to the thread Undergrad Unexpected findings in need of an explanation (retrograde motion of Mars).Bah. Way too complex to do by-hand. I barely got three months done, and month-by-month is still not granular enough. Gave up half way... -
DaveC426913 replied to the thread Writing: Read Only Have we found an ancient space habitat?.Which is exactly why it is a plausible phenom without speculating about aliens. No evidence points in that direction. If you wanted to... -
DaveC426913 reacted to Ibix's post in the thread Undergrad Acceleration calculation in Special Relativity with
Like.
Yes. In this case, the deceleration phase is just the time-reverse of the acceleration phase, and the return leg is the same as the... -
DaveC426913 replied to the thread Undergrad Acceleration calculation in Special Relativity.Yes. The four phases all have symmetrical profiles, just different choices of frames of reference. The starting velocity of phase 2 is... -
DaveC426913 replied to the thread Writing: Read Only Have we found an ancient space habitat?.? What would they not need to simulate gravity? Did they not grow up on a planet? -
DaveC426913 replied to the thread Writing: Read Only Have we found an ancient space habitat?.My calcs show this to have .112g on the inside surface. I'd weigh 20lbs. Less than the Moon, where I'd weigh 29lbs. -
DaveC426913 replied to the thread Writing: Read Only Have we found an ancient space habitat?.The article talks a lot, but gets into some numbers down near the end. It's a pity that after all that business about "could it be... -
DaveC426913 replied to the thread Undergrad Unexpected findings in need of an explanation (retrograde motion of Mars).Oof. I am becoming skeptical that a hand-drawn illustration will capture the details - I would have to intuit what dimensions can be... -
DaveC426913 replied to the thread Undergrad Unexpected findings in need of an explanation (retrograde motion of Mars).OK, I am hoping that you will intuit that, for a given speed, a shorter time spent in retrograde would result in a smaller observed... -
DaveC426913 replied to the thread Undergrad Unexpected findings in need of an explanation (retrograde motion of Mars).Yes, you did mention that. Altough surely the magnitude is affected by the relative velocities because they affect when, in their... -
DaveC426913 replied to the thread Undergrad Unexpected findings in need of an explanation (retrograde motion of Mars).Are you accounting for Earth's peri/aphelion at the times of opposition? (green arrows in diagram) For example, if Earth happens to be...





