Now consider a pipe that is stopped (i. e., closed at one end) but still has a fundamental frequency of 285 hz in air. how does your answer to part a, fhe, change? view available hint(s) now consider a pipe that is stopped (i. e., closed at one end) but still has a fundamental frequency of 285 in air. how does your answer to part a, , change? a. fhe increases. b. fhe decreases. c. fhe stays the same.

Aparticle's position is given by x = 3.00 - 9.00t + 3t2, in which x is in meters and t is in seconds. (a) what is its velocity at t = 1 s? (b) is it moving in the positive or negative direction of x just then? (c) what is its speed just then? (d) is the speed increasing or decreasing just then? (try answering the next two questions without further calculation.) (e) is there ever an instant when the velocity is zero? if so, give the time t; if not, answer "0". (f) is there a time after t = 3 s when the particle is moving in the negative direction of x? if so, give the time t; if not, answer "0".