# Search results

1. ### EXAM QUESTION black hole force?

Yeah, I saw that earlier but the approach confused me a bit. After thinking about it again, I've got it. Thanks a lot.
2. ### EXAM QUESTION black hole force?

you too, thanks
3. ### EXAM QUESTION black hole force?

you use the centripetal force equation. mv^2/r. you find v by dividing the length of the orbit (2*pi*r) by T. i think i remember that you have to convert the radius to meters and then convert back to km for the answer. on a side note, where you able to get problem 16? can you explain how...
4. ### Leaking air?

I am having trouble with this problem as well. Using that equation I only know that A=(pi*3^2) but don't know how to get v or how to solve for the rate of leakage (atoms per second). Any help would be appreciated.
5. ### Angular momentum of a multicomponent system

i finally got this problem. moment of inertia of the device is 8*(MR^2). You subtract sin(45)Rmv from it to get angular momentum. The problem has expired now so unfortunately it may not help.
6. ### Angular momentum of a multicomponent system

Multiply out the velocities and masses given and add them for Pinitial. Find final p of junk and subtract it from intitial sum. for the mc, its the 3 choices that say that things stay the same at loc. a,b, and c. I really need help with the original problem though. I have tried to find...
7. ### Angular momentum of a multicomponent system

I think the moment inertia for a ball is (2/5MR^2), however I don't know what else goes into computing the angular momentum. I am working on this same hw problem and only have b, c, and d left to do.