(55pts) kind of complicated circuits question

i'm not sure what it's referring to with closed and opened switches : /

Which notation is used to represent an alpha particle? a. b. c. d.

22. the top of a cliff is located a distance h above the ground. at a distance h/2 there is a branch that juts out from the side of the cliff, and on this branch a bird's nest is located. two children throw stones at the nest with the same initial speed, one stone straight downward from the top of the cliff and the other stone straight upward from the ground. in the absence of air resistance, which stone hits the nest in the least amount of time?

Mark creates a graphic organizer to review his notes aboutelectrical force.which labels belong in the regions marked x and y?