Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
The Lounge
Science Fiction and Fantasy Media
Sci-Fi Writing and World Building
Interplanetary Portals vs Gravity
Reply to thread
Message
[QUOTE="Grelbr42, post: 6844828, member: 732225"] Portals are difficult to get right. First you need to decide if they are going to conserve energy. Consider a simple thing like a portal with one end at the bottom of a large body of water like a lake. And the other end is at the top of a hill. If the water pressure can "go around" the change in altitude, then it can act as a very high pressure pump. Say the portal was 10.6 meters under water, you get 1 atm of pressure for "free." That will pump a huge amount of water. So if the portal does not conserve energy, you get some very interesting things. You can use it as a fairly large source of energy, for example. If it does conserve energy, you get some different interesting things. Somehow, the portal has to "know" what the relative change in gravitational potential is outside and inside, and find a way to equalize. That will mean there must be some interesting forces acting down the portal on the things going through. Alternatively, sending something through the portal might conserve energy by exerting forces on the portal itself. This is sort of like [URL]https://en.wikipedia.org/wiki/Lenz%27s_law[/URL] Lenz's law modified for portals. So maybe the objects going through the portal don't feel strange forces, but the portal gets squeezed or stretched or something so that energy is conserved. [/QUOTE]
Insert quotes…
Post reply
Forums
The Lounge
Science Fiction and Fantasy Media
Sci-Fi Writing and World Building
Interplanetary Portals vs Gravity
Back
Top