Suggest which element in Table 1 might be the most expensive. Give a reason why you cannot be certain about your prediction. Please look at the screenshots!

Asimply means that over time there was some sort of change.

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.

In a system, when potential energy decreases, then entropy also decreases. true false