At a convergent plate boundary, tectonic plates move toward one another and collide. Often, this collision forces the denser plate to subduct underneath the plate that is less dense. These subduction zones can cause- A. folded mountain formation
B. coastal erosion
C. sea-floor spreading
D. volcanic activity

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

650.j is the same amount of energy as? 2720cal1550cal650.cal2.72cal

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