Depending on weight cows can spend between 90 to 300 days in a feedlot so far studies for 45, 60 and 90 days have been done. How many days do you plan on feeding your cows with seaweed additive

Nitrogen-14 and nitrogen-15 are isotopes of the same element. how do these two isotopes differ? a. they have different numbers of nuclei. b. they have different numbers of protons. c. they have different numbers of neutrons. d. they have different numbers of electrons.