An ordinary flea has a mass of 210. how many newtons does it weigh?

this allows people to make the best decision or pursue the best option. when alternatives are weighed using their advantages and disadvantages, the option whose disadvantages outweigh the advantages (based on a qualitative or quantitative analysis) are shunned while those whose advantages outweigh their disadvantages are pursued.  

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge