12. During a camping trip, Ming gathers firewood and arranges it in the fire pit. She sets it on fire, and the result
is a roaring blaze. Which statement best shows all the
energy transformations that take place?
a. chemical to thermal
b. thermal to electromagnetic
c. chemical to thermal and electromagnetic
d. chemical and electromagnetic to thermal

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.