The average temperature of a region is determined by which of the following? I. distance from the equator
II. the quality of the soil
III. height above sea level
IV. proximity to large bodies of water

answer to choose-
I and IV only
B.
II, III, and IV only
C.
I and III only
D.
I, III, and IV only

A1-lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. the spring has an undeformed length of 5 in. and a constant k =25 lb/ft. knowing that the collar is released from being held at a determine, the speed of the collar and the normal force between the collar and the rod as the collar passes through b.