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
Force Field Experiments: Realistic Physics Questions
Reply to thread
Message
[QUOTE="Frabjous, post: 6835602, member: 499279"] Here are three ways to look at the problem. Let V=V[SUB]0[/SUB]/a. I have implicitly assumed that T[SUB]0[/SUB] is equal to the external-to-the-field air temperature. A “fast“ compression will look adiabatic. 1) Isothermal compression (air temperature does not change): In this case the relevant equation is PV=kT=constant PV/P[SUB]0[/SUB]V[SUB]0[/SUB]=1 P=P[SUB]0[/SUB]V[SUB]0[/SUB]/V P=aP[SUB]0[/SUB] 2) Adiabatic compression (there is no heat flow). In this case the pressure is determined by PV[SUP]ϒ[/SUP]=constant=P[SUB]0[/SUB]V[SUB]0[/SUB][SUP]ϒ[/SUP] P=P[SUB]0[/SUB](V[SUB]0[/SUB]/V)[SUP]ϒ[/SUP]=P[SUB]0[/SUB]a[SUP]ϒ[/SUP] for air ϒ=1.4 Now use PV=kT PV/P[SUB]0[/SUB]V[SUB]0[/SUB]=T/T[SUB]0[/SUB] T=T[SUB]0[/SUB]a[SUP]ϒ-1[/SUP] (T is measured in Kelvin) for air initially at room temperature (298K) and a=5 (volume compressed 80%) gives T=567K= 561°F 3) You could control the amount of heat flow to let T vary from T[SUB]0[/SUB] to the adiabatic temperature. In this case, use PV=kT PV/P[SUB]0[/SUB]V[SUB]0[/SUB]=T/T[SUB]0[/SUB] P=aP[SUB]0[/SUB]T/T[SUB]0[/SUB] [/QUOTE]
Insert quotes…
Post reply
Forums
The Lounge
Science Fiction and Fantasy Media
Sci-Fi Writing and World Building
Force Field Experiments: Realistic Physics Questions
Back
Top