To measure the kinetic engery from the inside and outside of something to be able to tell how hot or coll something is.. without touching it also
Answer:
plzz mark brainliast:
Explanation:
clue: The reaction has a single reactant.
A for the first and b for the second!!:))
The density of water is a physical property.
You can measure it without changing the water to a different substance.
It is <em>not a physical change</em> because the water does not change to ice or steam.
You can observe a <em>chemical property</em> or a <em>chemical change</em> only if the water <em>changes to a different substance</em>.
