Saturated process steam (1 atm, t 100'c, he 2,257 kj/kg) is condensed in a one-shell one-tube pass heat exchanger. a liquid stream (p 998 kg/m', cp = 4,181 j/kg-k, μ = 959 x 10" ns/m, k 0.606 w/m-k) enters the thin-walled copper tubes of 14 mm diameter and 3 m length at 15°c with an average velocity of 2 m/s. if the convective heat transfer coefficient for condensation outside the tubes is 21,800 w/m'k, determine: a) (20 points) the number of tubes n required to condense 5 kg of steam per second. b) (5 points) the outlet temperature, ts of the liquid stream. c) (5 points) the condensation rate, that can be achieved with this heat exchanger using the same liquid stream flowrate and inlet temperature.

Which of the following is not a good technique for managing used oil? a) have specific, labeled catch pans available for technicians who are collecting oil b) spills in your shop and any releases on pavement or outside should be poured down a drain c) do not use oil containers for antifreeze or other non-similar fluids d) be prepared for oil spills with the proper absorbents

Increasing the substrate concentration in an enzymatic reaction could overcome which of the following? a) the need for a coenzymeb) allosteric inhibitionc) competitive inhibitiond) insufficient cofactors

How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.