How much kinetic energy does the daughter have when 151gd undergoes a decay from rest?

Can somebody explain to me how newton's 3rd law relates to momentum? ~ap physics 1

It is may 5 and you are somewhere in the northern hemisphere. if you determine that the noon sun is 51 degrees above your southern horizon, what is the latitude of your location

Work out sian speed for the first 30 minutes of her journey. give your answer in km/h.