Calculate the energy required to heat a beaker of water at 18C to boiling. The mass of the water is 70.0 g.

explanation:

since this is put under health, i would define "ethical (medical) behavior" the way the oath for doctors is recited.   "first do no harm."

but the term in general means when given a choice between right and wrong, we should always choose right. if we do, then we are practicing ethical behavior.

b i think it’s a water wheel turning in a stream

i believe that it is a exoplanet

there is none because earth is stationary and flat.