From iaw at MIT.EDU Fri Sep 16 15:40:55 2005 From: iaw at MIT.EDU (Ian Waitz) Date: Fri, 16 Sep 2005 15:40:55 -0400 Subject: [Unified-mailman] Note on problem T3 Message-ID: Students, Note that "gage pressure" is pressure relative to atmospheric pressure. In homework T3, psig is "pounds per square inch gage". So for the final pressure in the rocket, you should add 60psi = 413.7 kPa to the atmospheric pressure of 101.3 kPa. The final pressure in the bottle will be 515 kPa. I apologize for not noting this earlier. - Ian -- ******************************************************************* M A S S A C H U S E T T S I N S T I T U T E O F T E C H N O L O G Y Professor Ian A. Waitz Department of Aeronautics and Astronautics Bldg. 33-408, MIT Phone: 617-253-0218 77 Massachusetts Avenue Fax: 617-258-0863 Cambridge, MA 02139-4307 email:iaw at mit.edu website: http://mit.edu/aeroastro/www/people/waitz/