What happens to the duration of the interval between exhalation and inspiration after hyperventilation?
Q. An experiment was undertaken in which the breathing rate and duration etc were counted after hyperventilation. What happens to the duration of the interval between exhalation and inspiration after hyperventilation?
Asked by johnny1234 - Thu May 3 03:31:59 2007 - - 1 Answers - 0 Comments

A. It increases...let me explain. Normal time between inspiration end expiration, is determined by the triggering of the peumotaxic center in the medulla oblongata (reticular substance ventral or anterior to the floor of IV ventricle) as CO2 builts up, there is a "breaking point" in which the chemorreceptors in the brain, discharge, and then, inspiration comes...this is in normal circumstances, breathing at rest Suppose now, you breath forcibly deeper and faster? The CO2 in the blood wil decrease, because most of it, will be gone momentarily with the exhalated air...so it takes longer to stimulate the chemoreceptors in the medulla oblongata, carotid bifurcation, aortic wall, etc. because you need good 3-4 minutes to "rebuild" or build up… [cont.]
Answered by Sehr_Klug 50 - Thu May 3 03:40:20 2007

How can I extract the playind duration from an mp4 file?
Q. I am trying to come up with a way of extracting from an MP4 file its playing duration. I have been searching the web in vain for a map of MP4 file format which would list where in the file the bytes encoding playing duration can be found. HELP!
Asked by JOLT JOLT - Sat Mar 14 16:12:16 2009 - - 1 Answers - 0 Comments

A. Download the program named Audacity.
Answered by Miguel - Mon Mar 16 05:31:14 2009

Flight-duration differences between flights and return flights?
Q. If you fly from London to New York will the duration of the flight be longer, shorter or the same as when you travel from New York to London..If there is a difference how is it explained?What about other geographical areas? (After alot of thinking I concluded that earth's rotation should not be the reason because the airplane has the speed of the earth already and therefore earth could be taken as a system of inertia...but then again I might be wrong).Something about the wind currents maybe? Please don't guess and answer only if you are confident that you know the correct answer.
Asked by 24_m_gr - Wed Nov 29 10:11:07 2006 - - 15 Answers - 0 Comments

A. wind willl be the main difference other than that its a mileage thing ,they may take a different route and then you also have the time zone changes but the actual times will be close to the same
Answered by doug b - Wed Nov 29 10:15:23 2006