Explain whether or not a particle would have acceleration if (a) it's moving in a straight line with constant speed, and (b) moving around a curve with constant speed

A particle that is moving in a straight line with constant speed will have zero acceleration or no acceleration causing it to move continuously. However, for a particle moving around a curve with constant speed will have a centrifugal acceleration. Hope this answers the question.

Fitness is the ability to perform only very light levels of physical activity.

Shania is trying to determine the oldest geologic unit on this map and the reason to why is she unable to do so is that  the units are all the same age.. when there is the same age, there will be no oldest geologic unit and that i cannot be credible.