Two skaters a and b of equal masses are standing on ice, facing each other. skater a is holding a ball. then a throws the ball to b and b catches it. which of the following statements provides the most accurate description of the subsequent motion of the skaters? assume that the ice surface is frictionless. (a) both a and b will start moving away from each other (b) both a and b will not move in either direction (c) both a and b will start moving towards each other (d) only a will start moving away from b while b stays stationary

An observer that stands still as the electron moves by him, will observe

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.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx