Notices
Results 1 to 13 of 13

Thread: What of these objects are useless on the moon surface?

  1. #1 What of these objects are useless on the moon surface? 
    wou
    wou is offline
    New Member
    Join Date
    Nov 2012
    Location
    Sweden
    Posts
    4
    ballpoint pen, box of juice (with a straw), football pump, flashlight, matches, pencil, alarm clock and juice jug?

    justify too


    Reply With Quote  
     

  2.  
     

  3. #2  
    Suspended
    Join Date
    Apr 2007
    Location
    Pennsylvania
    Posts
    8,795
    Homework?


    Reply With Quote  
     

  4. #3  
    wou
    wou is offline
    New Member
    Join Date
    Nov 2012
    Location
    Sweden
    Posts
    4
    i wish, a contest about information retrieval...
    Reply With Quote  
     

  5. #4  
    Suspended
    Join Date
    Nov 2012
    Location
    Apocalyptic Paradise
    Posts
    6,613
    Reply With Quote  
     

  6. #5  
    Moderator Moderator Markus Hanke's Avatar
    Join Date
    Nov 2011
    Location
    Ireland
    Posts
    7,302
    Quote Originally Posted by wou View Post
    ballpoint pen, box of juice (with a straw), football pump, flashlight, matches, pencil, alarm clock and juice jug?

    justify too
    None of these would be much good on the moon's surface, particularly the match ( no oxygen to burn ) and the pump ( no gas to pump ).
    Reply With Quote  
     

  7. #6  
    Cooking Something Good MacGyver1968's Avatar
    Join Date
    Aug 2006
    Location
    Dallas, Texas
    Posts
    2,051
    The flashlight, pencil and alarm clock should all work, I would assume....except you couldn't hear the alarm clock go off. The ballpoint pen should work, if the ink didn't just vaporize from the lack of pressure. If the juice box was sealed, it would probably explode from a lack of external pressure. Obviously the pump and match won't work because of a lack of atmosphere and oxygen. The juice jug itself should be ok, the juice would probably just evaporate.
    Fixin' shit that ain't broke.
    Reply With Quote  
     

  8. #7  
    Suspended
    Join Date
    Apr 2007
    Location
    Pennsylvania
    Posts
    8,795
    I'm not sure if the pen would work in the reduced gravity, if it's not a space pen. Space Pen - Wikipedia, the free encyclopedia
    Reply With Quote  
     

  9. #8  
    Suspended
    Join Date
    Nov 2012
    Location
    Apocalyptic Paradise
    Posts
    6,613
    Just a point of fun, so you guys can all laugh at me later... Obviously I misunderstood his intent. Thinking about the supposed coke bottle on the Moon and reading too much Enterprise Mission, I guess...
    Reply With Quote  
     

  10. #9  
    wou
    wou is offline
    New Member
    Join Date
    Nov 2012
    Location
    Sweden
    Posts
    4
    why wouldnt I hear the alarm clock? are you sure the ballpoint pen would work? why would the ink vaporize? could I still drink for a box of juice with a straw (hypothetically)? why would the juice evaporate?
    Reply With Quote  
     

  11. #10  
    Ascended Member Ascended's Avatar
    Join Date
    Apr 2012
    Location
    Norfolk
    Posts
    3,411
    Quote Originally Posted by wou View Post
    why wouldnt I hear the alarm clock? are you sure the ballpoint pen would work? why would the ink vaporize? could I still drink for a box of juice with a straw (hypothetically)? why would the juice evaporate?
    Hi there wou, the alarm clock would work as a clock, but you said 'alarm' clock, the alarm function wouldn't work because not enough atmosphere to carry the sound waves. I think the pen wouldn't work and the ink would freeze. Again I would think your juice would freeze. That said if you were in direct sun light it could vaporize due to intense heat.
    Everything has its beauty, but not everyone sees it. - confucius
    Reply With Quote  
     

  12. #11  
    Cooking Something Good MacGyver1968's Avatar
    Join Date
    Aug 2006
    Location
    Dallas, Texas
    Posts
    2,051
    Sound is just fluctuations in the air. There's no air on the moon's surface for the sound to propogate through...so no sound. With no air, that means no air pressure. The lower the air pressure, the lower the boiling point of a liquid. It's why you can't make a good cup of tea on top of Mount Everest. With almost no air pressure on the moon's surface...the liquid would just boil off. You couldn't drink from a straw, either. Your mouth creates a small low pressure area within the straw, which causes the surrounding air pressure to "push" the juice up the straw. There is no external pressure on the moon for this to work.
    Last edited by MacGyver1968; November 20th, 2012 at 10:13 AM.
    Fixin' shit that ain't broke.
    Reply With Quote  
     

  13. #12  
    wou
    wou is offline
    New Member
    Join Date
    Nov 2012
    Location
    Sweden
    Posts
    4
    what about in spaceship thats going from earth to moon? would ballpoint pen still work even when gravity is lower? what about the others?
    Reply With Quote  
     

  14. #13  
    Brassica oleracea Strange's Avatar
    Join Date
    Oct 2011
    Location
    喫茶店
    Posts
    16,850
    Quote Originally Posted by wou View Post
    what about in spaceship thats going from earth to moon? would ballpoint pen still work even when gravity is lower? what about the others?
    Don't ballpoint pens work via capillary action? So they should be OK. All the others would work in zero gravity as well. Although you wouldn't be able to keep any liquid in the jug.

    Edit: just saw the Space Pen link above. So I guess a normal ballpoint wouldn't work (reliably, at least).
    ei incumbit probatio qui dicit, non qui negat
    Reply With Quote  
     

Similar Threads

  1. Replies: 52
    Last Post: February 19th, 2014, 03:52 PM
  2. Replies: 41
    Last Post: August 2nd, 2012, 07:46 PM
  3. moon surface composition - pancake mix?
    By zanardm in forum Astronomy & Cosmology
    Replies: 2
    Last Post: March 7th, 2010, 12:25 PM
  4. are trauma counselors useless?
    By Jorge1907 in forum Behavior and Psychology
    Replies: 0
    Last Post: March 24th, 2009, 04:40 PM
  5. Man's most useless invention, discovery etc..
    By in forum General Discussion
    Replies: 33
    Last Post: December 9th, 2006, 08:02 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •