IPB

Welcome Guest ( Log In | Register )

A question here, behaviour of water on Mars
spdf
post May 24 2007, 12:38 AM
Post #1


Junior Member
**

Group: Members
Posts: 58
Joined: 17-September 06
Member No.: 1150



A question here

There are signs that in the past there was liquid water on Mars. So lets assume thats true.
Since the gravity on Mars is much lower than on Earth, so how does water (waves) behave on Mars compared to Earth?
Someone did say, that waves would have been much higher but also much slower. Is this true? Does anyone have an animation where you can see a waive on Earth in comparsion to a wave on Mars?

Thanks
Go to the top of the page
 
+Quote Post
 
Start new topic
Replies
dvandorn
post May 25 2007, 07:50 AM
Post #2


Senior Member
****

Group: Members
Posts: 3419
Joined: 9-February 04
From: Minneapolis, MN, USA
Member No.: 15



Actually, liquid water on Mars would behave consistently at nearly any atmospheric pressure we can imagine at which water can exist as a liquid. At least, at pretty much any point in a range from 10mb to 1b. The effect of winds would be different, but the speed at which water rises and falls is entirely defined by gravity. And since Mars is at roughly 1/3 G, water will fall roughly 1/3 more slowly.

I call as evidence Buzz Aldrin's description of the flow pattern of the wine he poured when he took Communion on the lunar surface. He said the wine poured in slow motion and moved about in the tiny chalice he used as it would on Earth, but more slowly and more with exaggerated motions. It was easier to make the liquid slosh and try to rise up over the lip of the cup than it would have been on Earth -- as he poured, the wine curled right up to the opposite lip of the cup. (Leave it to Aldrin to carefully examine the physics of fluid motion in 1/6 G while taking Communion... smile.gif )

Roughly double the gravity (damping down the motions somewhat) and scale up a tiny chalice to rushing floodwaters and lakes, if not seas, and you get an idea of the semi-slow-motion, vertically exaggerated waves you'd likely have seen on Mars.

-the other Doug


--------------------
“The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
Go to the top of the page
 
+Quote Post

Posts in this topic
- spdf   A question here   May 24 2007, 12:38 AM
- - tuvas   This is just a guess, but I would guess waves woul...   May 24 2007, 08:19 PM
- - ugordan   I believe the higher-and-slower waves is the corre...   May 24 2007, 08:44 PM
- - nprev   Another major variable would have been atmospheric...   May 24 2007, 11:17 PM
- - dvandorn   Actually, liquid water on Mars would behave consis...   May 25 2007, 07:50 AM
- - AndyG   ...and add bigger drops. Surface tension will play...   May 25 2007, 08:31 AM
- - nprev   Great story, oDoug! Yeah, I should have bee...   May 25 2007, 11:50 AM
- - Juramike   While there would be no really big tides on a Mart...   May 25 2007, 03:41 PM
- - helvick   On earth the average atmospheric pressure of ~101k...   May 25 2007, 04:52 PM
|- - marsbug   I have a question I've not been able to resolv...   Nov 15 2007, 06:14 PM
|- - dburt   QUOTE (marsbug @ Nov 15 2007, 11:14 AM) I...   Nov 15 2007, 11:30 PM
|- - Gsnorgathon   Not to rain (metastably or otherwise) on anyone...   Nov 16 2007, 12:41 AM
|- - Juramike   QUOTE (Gsnorgathon @ Nov 15 2007, 08:41 P...   Nov 16 2007, 08:57 PM
|- - nprev   QUOTE (Juramike @ Nov 16 2007, 12:57 PM) ...   Nov 17 2007, 03:49 PM
|- - Juramike   QUOTE (nprev @ Nov 17 2007, 10:49 AM) .....   Nov 17 2007, 05:02 PM
|- - ElkGroveDan   QUOTE (Juramike @ Nov 17 2007, 09:02 AM) ...   Nov 17 2007, 05:38 PM
- - Greg Hullender   Here's a couple of useful comments from a NASA...   Nov 15 2007, 06:41 PM
- - djellison   And of course, the fact that water can exist, at s...   Nov 15 2007, 07:12 PM
|- - rlorenz   QUOTE (djellison @ Nov 15 2007, 02:12 PM)...   Nov 16 2007, 01:47 AM
|- - ngunn   QUOTE (rlorenz @ Nov 16 2007, 01:47 AM) I...   Nov 16 2007, 01:03 PM
- - Juramike   Both theory and experiment agree that cold brine s...   Nov 15 2007, 10:41 PM
- - nprev   Mike or HDP Don, how different are the curves for ...   Nov 16 2007, 01:06 AM
|- - dburt   QUOTE (nprev @ Nov 15 2007, 06:06 PM) Mik...   Nov 16 2007, 08:27 PM
|- - nprev   QUOTE (dburt @ Nov 16 2007, 12:27 PM) Ver...   Nov 17 2007, 01:17 AM
|- - dburt   QUOTE (nprev @ Nov 16 2007, 06:17 PM) Tha...   Nov 17 2007, 01:40 AM
- - ngunn   Thanks for that Hecht link. Definitely some counte...   Nov 16 2007, 08:51 PM
- - nprev   They don't call ya Herr Doktor Professor for n...   Nov 17 2007, 01:50 AM
|- - dburt   QUOTE (nprev @ Nov 16 2007, 06:50 PM) The...   Nov 17 2007, 03:03 AM
- - marsbug   Thank you very much one and all, I can look foward...   Nov 17 2007, 05:25 PM
- - nprev   Rats...knew I shoulda gone to EGD's alma mater...   Nov 18 2007, 12:15 AM
- - Juramike   Space.com article says that the crust of Mars is c...   May 15 2008, 07:03 PM
|- - dburt   QUOTE (Juramike @ May 15 2008, 12:03 PM) ...   May 17 2008, 01:14 AM
||- - dvandorn   QUOTE (dburt @ May 16 2008, 08:14 PM) ......   May 17 2008, 07:06 AM
||- - Juramike   QUOTE (dburt @ May 16 2008, 08:14 PM) Hop...   May 17 2008, 12:53 PM
||- - dburt   QUOTE (Juramike @ May 17 2008, 05:53 AM) ...   May 19 2008, 02:58 AM
||- - SickNick   QUOTE (Juramike @ May 17 2008, 10:53 PM) ...   Jun 8 2008, 02:38 PM
|- - Juramike   QUOTE (Juramike @ May 15 2008, 02:03 PM) ...   May 18 2008, 06:35 PM
- - dvandorn   As a general comment to the "discovery" ...   May 17 2008, 07:17 AM
- - silylene   QUOTE (spdf @ May 24 2007, 12:38 AM) A qu...   May 24 2008, 03:21 AM
|- - rlorenz   QUOTE (silylene @ May 23 2008, 11:21 PM) ...   May 24 2008, 01:27 PM
|- - Juramike   QUOTE (rlorenz @ May 24 2008, 09:27 AM) M...   May 24 2008, 03:05 PM
|- - silylene   I agree that the problem with resonance waves make...   May 25 2008, 02:05 AM
- - Juramike   A rotovap simulation experiment! That...is......   May 24 2008, 04:28 AM


Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 29th March 2024 - 03:51 PM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is funded by the Planetary Society. Please consider supporting our work and many other projects by donating to the Society or becoming a member.