A girl is riding a bicycle at a constant velocity of 3.0 m/s along a straight road. At time t=0, she passes a boy sitting on a stationary bicycle. At time t=0, the boy sets off to catch up with the girl. His velocity increases from time t=0 until t=5.0s, when he has converted a distance of 10m. He then continues at a constant velocity of 4m/s. a. Draw the displacement-time graph for the girl from t=0 to 12s
b. On the same graph axes, draw the displacement-time graph for the boy
c. Using your graph, determine the value of t when the boy catches up with the girl.

2.which choice most accurately explains what happens to the bonds between atoms when water changes to steam, and what becomes of the energy added during this phase change? when water changes to steam bonds between molecules are created. after reaching the boiling point, energy is used to change bond strength and change the kinetic energy of the atoms. when water changes to steam bonds between molecules break apart. after reaching the boiling point, energy is used to break bonds, but does not affect the kinetic energy of the atoms. when water changes to steam bonds between molecules are created. after reaching the boiling point, energy is used to break bonds, but does not affect the kinetic energy of the atoms. when water changes to steam bonds between molecules break apart. after reaching the boiling point, energy is used to change bond strength and change the kinetic energy of the atoms.