What's the momentum of a 3.5-kg boulder rolling downhill at 5 m/s? a. 17.5 km·m/s b. 70 kg·m/s c. 8.5 kg·m/s d. 14.3 kg·m/s

The modern periodic table has groups.

Which of the following is the correct formula for copper (i) sulfate trihydrate? cuso4 · 3h2o cuso4(h2o)3 cu2so4(h2o)3 cu2so4 · 3h2o

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?