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pzkpfw
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pzkpfw
Order of Kilopi
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Today,
03:58 AM
grapes
started a thread
SPF ratings for sunscreens
in
Small Media at Large
From USA Today today: http://m.usatoday.com/article/news/2325341 OK I might believe that SPF ratings are gimmicks, as the article says, but I'm...
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2 replies | 43 view(s)
Today,
03:00 AM
grapes
replied to a thread
Looking for a solid pair of binoculars
in
Astronomical Observing, Equipment and Accessories
The last two links are the same.
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6 replies | 69 view(s)
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...
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36 replies | 1737 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. (...
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29 replies | 314 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
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2510 replies | 76698 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...
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23 replies | 442 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! :)
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2510 replies | 76698 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,...
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18 replies | 324 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...
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23 replies | 442 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? :)
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18 replies | 324 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...
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23 replies | 442 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...
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14 replies | 268 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...
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1561 replies | 53653 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.
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14 replies | 268 view(s)
2013-May-13,
07:55 PM
pzkpfw
replied to a thread
Coming to America
in
Off-Topic Babbling
Off to work soon, so just a quick - thank you - to everybody. Already some Cultural Learnings of America for Make Benefit Kiwi. (2nd movie title...
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20 replies | 403 view(s)
2013-May-13,
08:05 AM
pzkpfw
started a thread
Coming to America
in
Off-Topic Babbling
My Daughter is doing a year of work at DisneyWorld; it's the perfect opportunity for the rest of us to visit the U.S. too (heck, they almost speak...
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20 replies | 403 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...
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14 replies | 268 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)
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2510 replies | 76698 view(s)
2013-May-11,
02:44 AM
pzkpfw
replied to a thread
Really trivial stuff that bugs you
in
Off-Topic Babbling
Any number of shows (e.g. "{country}'s got talent" type stuff) are spoiled by silly editing and camera work. Very annoying to hear the studio...
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2510 replies | 76698 view(s)
2013-May-11,
02:40 AM
pzkpfw
replied to a thread
My Frustration with the Life In Space forum
in
Forum Introductions and Feedback
I think in the OP, "mild" is mistakenly spelled as "wild".
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170 replies | 3634 view(s)
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About pzkpfw
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About pzkpfw
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Netherlands born. Kiwi raised.
Location:
New Zealand
Interests:
Wishing I were riding.
Occupation:
Self employed, mostly programmer.
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Get up, a get-get, get down.
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