What is the speed of a truck that travels 15 km in 12 minutes

When an object moves in uniform circular motion, the direction of its acceleration is a) in the same direction as its velocity vector. b) in the opposite direction of its velocity vector c) is directed toward the center of its circular path. d) is directed away from the center of its circular path. e) depends on the speed of the object.

Which of the following correctly describes the early view of catastrophism?

What will a positive and a negative charge do if they are separated from each other?