A light-year is the distance that light travels through space in 10 years.

A-True

B-False

What is the function of the commutator in a dc motor? a. to spin the magnet b. to change direct current into alternating current c. to change alternating current into direct current d. to spin the wire coil

Which units can be used to measure length or distance? check all that apply. gram meter kilometer liter inch

The passage that directs air to the lungs is called a. diaphragm. b. larynx. c. bronchi. d. pharynx.