A. list at least 5 examples of events or factors that could cause extinction. 

Anybody wanna ? (picture included? )

Which of the following situations is impossible? a) an object has velocity directed east and acceleration directed east. b) an object has zero velocity but non-zero acceleration. c) an object has constant non-zero velocity and changing acceleration. d) an object has velocity directed east and acceleration directed west. e) an object has constant non-zero acceleration and changing velocity.

In addition to gravity, what is the other predominant force that affects the motion of a pendulum?