B. Measuring the Two Pressures (to + 0.1 torr; P. water for B-4 from Appendix "III" for the Told temp) Trial #1 Trial #2 (if done) B-3 out = torr (from barometer) = Phot out = torr B-4 P water = torr @ OC P water torr @ B-5 Pin = P cold + Pwater So when Pout = Pan then P cold = Pout - P water SO P cold = out - PW water and with the values, it's Pcold= P cold torr torr