If 100 atoms of element Y contain 60 atoms of 9Y and 40 atoms of 11Y, calculate the relative atomic mass (one decimal place) of Y​

question: ray weighs 100 kilograms, his wrestling partner, bobby, weighs 50 kilograms. if ray moves at 4 m s , how fast will bobby have to run at him to apply an equal amount of kinetic energy?

answer: 8 m/s he needs to run twice as fast to keep up so he has some work to do

explanation:   if the mass has units of kilograms and the velocity of meters per second, the kinetic energy has units of kilograms-meters squared per second squared.

question answered by

(jacemorris04)

i think its 100

i hope this !

more infor would

a lot