Hi Ray, The formula you are looking for is A1v1=A2v2 where A is the cross-sectional area and v is the speed. BTW, your physical principles are slightly incorrect. Liquids don't expand or compress. (with exception of extreme pressures and CTE expansion) Bernoulli's equation is P+(1/2)pv^2+pgy=C, while fundamental to fluid dynamics, I'm not sure it will help in this case. Kind Regards Ryan Grant Advanced Technology Engineer MCMS (208) 898-1145 [log in to unmask] > -----Original Message----- > From: Golembiewski, Ray [SMTP:[log in to unmask]] > Sent: Monday, November 12, 2001 12:34 PM > To: [log in to unmask] > Subject: [TN] Formula? > > What is the formula that proves when I put my thumb on the end > of a garden house, the pressure increases and volume decreases. Is the > same formula used with air? Please help, > > Ray Golembiewski C.I.D. > Manufacturing Test Engineer > Projects Unlimited, Inc. > (937) 918-2200 > > -------------------------------------------------------------------------- > ------- > Technet Mail List provided as a free service by IPC using LISTSERV 1.8d > To unsubscribe, send a message to [log in to unmask] with following text in > the BODY (NOT the subject field): SIGNOFF Technet > To temporarily halt delivery of Technet send the following message: SET > Technet NOMAIL > Search previous postings at: www.ipc.org > On-Line Resources & Databases > > E-mail Archives > Please visit IPC web site (http://www.ipc.org/html/forum.htm) for > additional > information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 > ext.5315 > -------------------------------------------------------------------------- > ------- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------