This is a line graph used to describe the motion of an object. a graphic representation of velocity. also used to represent speed.

i believe it is "they are not used up by reactions" as the answer to your question, text me back if this is correct because i just learned this.

answer >   yes we do, women; have three holes, urethral opening(pee hole, vagina, and the women pee/girls pee out of the urethra like the men do; only they have a single opening to pee/ejaculate.   (sorry if i'm too forward with this, but this is for a biology class, isn't it? )

hope that !         : )

density and pressure