The total energy of the roller coaster is 39,815 joules at the top of the largest hill. If the car has a mass of 188kg and at point B you are 7.6 m off
the ground. What is the velocity at that point?

Astudent is performing an experiment comparing sound and light waves. the student gathers the following data. what conclusion does the student most likely make based on this data? light waves always travel the same speed; however, the speed of sound is determined by the medium that it travels through. all sound waves always have the same energy, so the temperature of the medium does not affect wave speed. light needs to vibrate particles, so it travels fastest in tightly packed solids, while sound does not need a medium, so it travels fastest in a gas. tightly packed particles in solids slow down the light waves; however, sound waves make particles bounce into each other, so they travel faster in solids.

Rohit is trying to tune an instrument

Explain what it means to view something from a frame of reference. provide an example that illustrates your explanation. (4 points)