5. The answer to the previous question implies that there might be a relationship between the color index of a star and its main-sequence lifetime. What is that possible relationship

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

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Ineed asap! list 3 examples in which friction us or makes things easier in our daily life. explain the effect of friction for each. *make sure you explain the effect of friction for each example! *