How should the resultant of a + b look?

Ameter stick is pivoted at the 0.50-m line. a 3.0-kg object is hung from the 0.15-m line. where should a 5.0-kg object be hung to achieve equilibrium (the meter stick oriented horizontal and motionless)?

What happens to an isotope during radioactive decay?

Newtons view of arrangement of the universe. don't copy from anywhere.