Some states have a traffic law requiring passengers under the age of 18 to wear a seat belt. Which statement is correct about the traffic law? a It is a scientific law. b It is a societal law. c It will always remain the same. d It describes a natural process.

For general projectile motion, when the projectile is at the highest point of its trajectory, its acceleration is zero? a)the horizontal and vertical components of its velocity are zero. b) its velocity is perpendicular to the acceleration. c)the horizontal component of its velocity is zero. d)its velocity and acceleration are both zero.

Steam enters an adiabatic diffuser at 150 kpa and 1208c with a velocity of 550 m/s. determine the minimum velocity that the steam can have at the outlet when the outlet pressure is 300 kpa.

Can anybody me with this? ? (picture included.)