Which of the following statements best describes the object's motion between the time period of 23s to 30s?
A. the object is at rest
B. the object has a negative velocity
C. the object has a positive velocity
D. the object has a constant acceleration

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.