Liam and Andrew are working in the lab with a scalpel. Since they are working with a sharp object they should make sure to - A. know the location of the eye wash station.
B. avoid wearing baggy clothes that can catch on fire.
C. always cut towards themselves.
D. wear proper safety gear like goggles and gloves.

Air enters a horizontal, constant-diameter heating duct operating at steady state at 290 k, 1 bar, with a volumetric flow rate of 0.25 m°/s, and exits at 325 k, 0.95 bar. the flow area is 0.04 m2. assuming the ideal gas model with k = 1.4 for the air, determine (a) the velocity at the inlet and exit, each in m/s, and (c) the rate of heat transfer, in kw flow rate, in kg/s, (b) the mass kg 0.3