Which describes the average velocity of a unicycle going around in circles
( there can be more then one answer)

a. the total displacement divided by the time
b. every time the unicycle returns to its starting point, the average velocity equals zero.
c. the average acceleration divided by the time
d. the slope of the acceleration vs time graph

What is the term for a water wave that is created by an underwater earthquake?

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.

Name the organism that belongs to the kingdom protista.