In a new chemical process, a reboiler for a tower requires a heating medium at 290°c. two possible solutions have been suggested: (a) use high-pressure steam superheated to 320°c, and (b) use saturated steam at 320°c. suggest one disadvantage for each suggestion.

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.