Which two factors have an effect on the gravitational force between two objects?
A. Their masses
B. The strong nuclear force
C. Their charges
D. The distance between them
E. Electromagnetic force

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

What changes occur in the brain during the teenage years? 25 points, someone me out!a.) thinking becomes slower as the brain grows larger. b.) connections between neurons become stronger and faster. c.) unused neurons fuse together to form larger, better functioning neurons. d.) more neurons are developed.

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.