You pour equal quantities of hot tea into identical cups. After pouring cold milk into cup A, the phone rings. You chat for two=20 minutes then pour the same quantity of equally cold milk into cup B. Which cup is now hotter, or are they the same? (I got this off the ABC website). Colin -- cdb, on 25/09/2011 --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .