Electron a falls from energy level x to energy level y and releases blue light. electron b falls from energy level y to energy level z and releases red light. which transition, from x to y or from y to z, has a greater energy difference? explain your answer and how you arrived at it.

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

Phase changes are chemical changes. true or false

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?