Identify the incorrect statement about a single motor unit.- fine motor skills depend on the development of small motor units.- the smaller the number of muscle fibers, the more precise the movement.- muscle fibers of one motor unit intermingle with the fibers of another motor unit.- some motor units include as many as 2000 muscle fibers.- the more neurons involved, the more powerful the contraction.

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.

Acompound machine is also called a machine. a. force b. simple c. complex d. directional

Explain earth's motion, using the terms "precession" and "rotation" in your answer.