Which is a difference between the focus of a nuclear engineer and the job of a nuclear chemist?
nuclear engineers are concerned with the design, construction, and operation of nuclear reactors; nuclear chemists study nuclear reactions, radioactive elements, and nuclear power.
nuclear chemists are concerned with the design, construction, and operation of nuclear reactors; nuclear engineers study nuclear reactions, radioactive elements, and nuclear power.
nuclear engineers are concerned with the production and use of radioactive sources; nuclear chemists study the absorption of radiation.
nuclear chemists are concerned with the production and use of radioactive sources; nuclear engineers study the absorption of radiation.

Nuclear engineers are concerned with the design, construction, and operation of nuclear reactors; nuclear chemists study nuclear reactions, radioactive elements, and nuclear power.

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Tolerance to high levels of salinity

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.