What is the definition of momentum? A- The amount of matter in an object.
B-Mass in motion.
C-Speed with direction.
D- The resistance to change motion

Which of these conditions most likely produces an unstable isotope?

What term is applied to a scientist who studies ancient life, including animal and plant fossils a. anthropologist b. dendroclimatologist c. geophysicist d. paleontologist

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules