The figure represents the position of a particle as it travels along the x-axis. Between t = 2 s and t = 4 s, what is (a) the average speed of the particle and (b) the average velocity of the particle? 
Definitions:
Line Voltage
The voltage measured between any two phases in a multi-phase electrical system.
Phase Voltage
The voltage measured across a single component in a multiphase system.
Wye
A three-phase connection in electrical systems where the endpoints of three coils are connected at a single neutral point, forming a Y shape, commonly used in power distribution.
Delta
In electrical engineering, it often refers to a triangular connection in a three-phase system where the end of one winding is connected to the start of the next.
Q3: Four equal negative point charges are located
Q20: Light of wavelength 687 nm is incident
Q25: You and your surfing buddy are waiting
Q37: A 1.15-kg grinding wheel 22.0 cm in
Q37: Two positive point charges +4.00 μC and
Q42: A 7.8-kg solid sphere, made of metal
Q43: The spherical side mirror on a car
Q47: In the figure, an open tank contains
Q54: A nonconducting sphere contains positive charge distributed
Q59: A thin converging lens is found to