Come for free point's

Space is not completely empty. there are small particles in space. what happens when these particles come together?

Ineed asap! ! what is the name of the system in which each branch of the u.s government can limit the actions of the other branches? a. perpetual union b. division of powers c. cooperative federalism d. checks and balances

Why is it important that dr. luther king jr. use non-violent protest to create social change?