Answer:
No, it's a physical reaction.
Explanation:
A chemical change produces new chemical compounds, but combining water and powder is just mixing the powder with the water. It's not a new compound.
I don't know how to really explain, sorry :)
To determine the velocity of an object, you need to know the displacement and the change in time.
v = displacement / change in time
Answer:
I think it's B
Explanation:
I might be wrong, but please tell me.