View Profile: joema - Cosmoquest Forum

Yesterday, 06:48 PM

grapes replied to a thread Machines in space in Science and Technology

Nobody else may have mentioned the effect of cosmic rays on computers and digital cameras, but that sure seems like an issue. Modern machines have a...

29 replies | 1676 view(s)

Yesterday, 10:12 AM

grapes replied to a thread Mechanical advantages of rails? in Science and Technology

Simple physics and material strength allows one to calculate number of wheels. A single coal car carries a small hill of rock. (...

14 replies | 198 view(s)

2013-May-17, 08:43 PM

grapes replied to a thread Really trivial stuff that bugs you in Off-Topic Babbling

Spouse -- Spice Trousers -- Taser Douse -- Dice Souse -- Sots

2504 replies | 76579 view(s)

2013-May-16, 06:43 PM

grapes replied to a thread What is the Average Distance Between Earth and Sun? in Astronomy

If it is given as 93,000,000 miles, there are two significant digits--it's been rounded to 93 million. Of course, it's 91.5-94.5 million over the...

23 replies | 420 view(s)

2013-May-16, 10:08 AM

grapes replied to a thread Really trivial stuff that bugs you in Off-Topic Babbling

Interesting. The wiki says it is folk etymology. From http://www.navy.mil/submit/display.asp?story_id=11795 That ship may have sailed! :)

2504 replies | 76579 view(s)

2013-May-15, 04:20 PM

grapes replied to a thread About Venus in Astronomy

OK, that clears that up. The phrase "null hypothesis" is too general and actually controversial. Why not just say, Hypothesis A, Hypothesis B,...

18 replies | 316 view(s)

2013-May-15, 04:11 PM

grapes replied to a thread What is the Average Distance Between Earth and Sun? in Astronomy

I think that was their point! :) There is some justification for using the semi-major axis as the average distance, as we've said, and the...

23 replies | 420 view(s)

2013-May-15, 12:39 PM

grapes replied to a thread About Venus in Astronomy

Not just superficial resemblances, either, but as Shaula mentions, in the DNA as well. Too? What are you calling the null hypothesis? :)

18 replies | 316 view(s)

2013-May-15, 03:36 AM

grapes replied to a thread What is the Average Distance Between Earth and Sun? in Astronomy

Like Glom, I'd say yes. Aphelion plus perihelion equals major axis, so half of that is the semi-major axis, and Kepler's laws depend upon the...

23 replies | 420 view(s)

2013-May-14, 04:25 PM

grapes replied to a thread Lagrange point with a mass, does it create baby L-points? in Space/Astronomy Questions and Answers

But isn't the moon of appreciable size? Or, going back to the OP, substantial enough? The moon is large enough, relative to the earth, that some...

14 replies | 262 view(s)

2013-May-14, 02:21 PM

grapes replied to a thread Really trivial stuff that amuses you... in Off-Topic Babbling

Yesterday, some kids asked which languages I knew. I claimed an additional ability to speak British, and they were impressed, until I admitted it...

1560 replies | 53558 view(s)

2013-May-14, 10:23 AM

grapes replied to a thread Lagrange point with a mass, does it create baby L-points? in Space/Astronomy Questions and Answers

Putting in a second moon into the earth/moon system would not put you over the 1/25 limit.

14 replies | 262 view(s)

2013-May-12, 07:53 PM

grapes replied to a thread Lagrange point with a mass, does it create baby L-points? in Space/Astronomy Questions and Answers

L4/L5 are stabile when the large mass is 25 times as massive as the smaller mass. The earth is 80 times the mass of the moon. So, when you say...

14 replies | 262 view(s)

2013-May-12, 05:47 PM

grapes replied to a thread Really trivial stuff that bugs you in Off-Topic Babbling

Only in the last hundred years http://en.m.wikipedia.org/wiki/Cootie_(game)

2504 replies | 76579 view(s)

2013-May-10, 09:23 PM

grapes replied to a thread Which CQ rule, or combo of rules, say "No Trolls Allowed"? in Forum Introductions and Feedback

Uh-oh Jim, we've hurt his feelings again. Whose turn is it to accompany him to the tiki bar?

9 replies | 233 view(s)

2013-May-08, 10:20 AM

grapes replied to a thread Proving one's bravery in Off-Topic Babbling

I'm not just being ironic when I say that that's hard to believe. :) Why would they kick you off? Did tempers flare, and insults fly?

61 replies | 1131 view(s)

2013-May-08, 10:08 AM

grapes replied to a thread "High Quality Research Act" in Astronomy Activism

What about roadblocks put up against nuclear power? How do we analyze those? Who gets the "credit"?

37 replies | 1359 view(s)

2013-May-08, 12:41 AM

grapes replied to a thread What Left These Spooky Trails in the Sky? in Universe Today

Universe Today posts on CosmoQuest (attributed to Fraser) are generated automatically when articles (usually written by others) are posted to...

4 replies | 128 view(s)

2013-May-07, 04:09 PM

grapes replied to a thread Should the U.S.A. put a '57' chevy in high orbit above Earth? in Off-Topic Babbling

283 cubic inches produces 283 horsepower? What a coincidence!

28 replies | 522 view(s)

2013-May-07, 09:40 AM

grapes replied to a thread Thinking Person's Bag of Tricks in Off-Topic Babbling

I'll second the "in the shower" and add "while driving" and like Galileo and his pendulum "in church" Maybe the ol' mental governor is distracted...

23 replies | 377 view(s)

2013-May-05, 07:56 AM

grapes replied to a thread did this water bend light? in Off-Topic Babbling

I'm guessing just the opposite. One beam is the reflection off the surface, and of course the surface moves, tilting back and forth. The other...

6 replies | 158 view(s)

2013-May-04, 09:16 AM

grapes replied to a thread Can we use Sunlight to take better photos of faint objects in space? in Space/Astronomy Questions and Answers

Sort of like flash photos from the stands at a football game--"everyone" knows the flash has no chance to illuminate the subject. The subject is too...

13 replies | 322 view(s)

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