View Profile: Ronald Brak - Cosmoquest Forum

Today, 10:19 AM

grapes replied to a thread Salem/Dallas Oregon, Activity in Geology & Planetary Surfaces

A 1.5! North Carolina was thought to be geologically inactive, then they bid for the superconducting supercollider, and installed a seismic...

3 replies | 47 view(s)

Today, 10:15 AM

grapes replied to a thread How practical is beach soccer? in Off-Topic Babbling

Or quidditch, played on many campuses

3 replies | 42 view(s)

2013-May-21, 10:03 AM

grapes replied to a thread how do i have all my topics/posts deleted and username removed? in Forum Introductions and Feedback

We try. I can remember one poster who signed his full name to his initial post. The post was high enough quality that I was certain he'd be around...

22 replies | 1182 view(s)

2013-May-21, 08:12 AM

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

It's hard to imagine an alternative steel factory without some sort of rail system--you're not going to shuttle hot ladles back and forth on rubber...

53 replies | 691 view(s)

2013-May-20, 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...

8 replies | 150 view(s)

2013-May-20, 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.

7 replies | 291 view(s)

2013-May-19, 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...

36 replies | 1812 view(s)

2013-May-19, 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. (...

53 replies | 691 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

2542 replies | 77905 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 | 472 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! :)

2542 replies | 77905 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 | 339 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 | 472 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 | 339 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 | 472 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 | 282 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...

1572 replies | 54234 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 | 282 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 | 282 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)

2542 replies | 77905 view(s)

Ronald Brak
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Ronald Brak
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