Which of the models described below is least likely to produce reliable, reproducible results? *
A model for calculating interest rates versus economic growth
A wind tunnel and a model airplane to study lift and drag ratios
Two climate change models using similar carbon dioxide values and variables
Two climate change models with different response times based on cloud cover
evaporation and rate of temperature change

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.

during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.