27 Beryllium has an atomic mass of 9 and an atomic number of 4. How many neutrons does Beryllium have? *

Two objects of different mass start from rest, are pulled by the same magnitude net force, and are moved through the same distance. the work done on object 1 is 900 j. after the force has pulled each object, object 1 moves twice as fast as object 2. how much work is done on object 2?

Which of the following is not a means to accelerating? question 4 options: a)increase speed b)remain still c)decrease speed d)change direction

An element becomes a positively charged ion when itloses protons. loses electrons. gains electrons. gains neutrons.