Compared to the sound of a car horn, the sound of a bird chirping has

Groups of organs that work together to complete a process in the body are called: a. cells b. tissues c. nerves d. systems

Which type of current is produced by a wire breaking magnetic field lines and changing the polarity? a. alternating b. direct c. straight d. alternating and direct

Apulley with a mechanical advantage of 5 will require you to pull times the amount of rope. a. 1/5 b. 5 c. 10 d. 15