When a particular wave is vibrating with a frequency of 4.00 hz, a transverse wave of wavelength 60 cm is produced. determine the speed of waves along the wire.

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?

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".

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?