Determine whether each of the following is exothermic or endothermic and indicate the sign of? h.
a. natural gas burning on a stove
b. isopropyl alcohol evaporating from skin
c. water condensing from steam

indicate the sign of δh.

which one is positive and which one is negative?

Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger

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.

Which governments provide garbage collection services to homes and businesses