Isaac is accelerating a wagon when Paul begins to pull in the same direction, which doubles the net force on the wagon. What happens to the wagon's acceleration? * A. acceleration will increase
B. acceleration will decrease
C. acceleration will stay the same
D. acceleration will increase, then decrease

Which of the following is not a characteristic of a hydrogen bond? 1. it is responsible for the unusual physical properties of water. 2. it is weaker than a covalent bond. 3. it is stronger than other dipole-dipole interactions. 4. it can occur when hydrogen is covalently bound to very electronegative elements liks f, cl, br and i.