In a fifth experiment, Experiment E, marble 1 has a pre-collision momentum of 20 units. The total post-collision momentum of marbles 1 and 2 is measured as 40 units. Which of these momenta is most likely the pre-collision momentum of marble 2?

Based on the equation and the information in the table, what is the enthalpy of the reaction?

Which of the following would have less momentum than a 52 kg cheetah running at 10 m/s?

Which explanation is true about what happens to a ray of light when it strikes a mirror? a. a light ray is transmitted toward a mirror at a certain angle. the light ray is then reflected by the mirror at an equal angle but in the opposite direction of the transmitted ray. b. an incident ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then reflected at an angle equal to the angle of incidence but on the opposite side of the perpendicular line. c. a reflecting ray strikes a mirror at an angle with a line perpendicular to the mirror. the light ray is then refracted at an angle equal to the angle of the reflecting ray and on the same side of the perpendicular line. d. an incident ray strikes a mirror at an angle with a line parallel to the mirror. the light ray is then transmitted at an angle equal to the angle of incidence but on the opposite side of the parallel line. you so much! : -d take the time to try and answer correctly.