How does the speaker exercise power over a committee

it makes your voice or whatever you are doing with it and makes it louder. doing this makes people pay attention to you and makes them hear what you say therefore they have a better chance of following you or listening to you. therfore establishing dominance.

by appointing the chair and a majority of the members

i want to say death; parole, probation, and fines are still being used all the time.