Answer:
A
Explanation:
kinetic energy of a body at rest = 0
A total solar eclipse happens when the moon completely hides the solar surface, cutting off all direct rays of sunlight from the the person watching.
Answer:
irreversible changes
Explanation:
Most chemical changes are permanent and cannot be reversed. That is because a chemical change involves changing the molecular composition which can't be reversed. A common example of a chemical change would be burning wood. The wood burning into ash is changing the molecular composition of the wood transforming it to ash. Now can ash be changed back into wood? No, it is a "irreversible change."
Hope this helps.
D requires additional information like the heats of formation for compounds in the equation, and they're not found on periodic table.
Lowering the activation energy