Stored mechanical energy is energy stored and awaiting to be used and mechanical energy is the energy that was stored being used.
Answer:
2 and 4
Explanation:
The rest of the changes are chemical. 1 has a chemical reaction happen which makes light sticks glow. 3 is because browning the meat actually causes some new compounds to form and cause caramelization.
For 2, the oxygen is simply heating up and expanding which pops the balloon. 4 is just a phase change of water vapor to liquid water.
Its <span>c.chromatography is the process of separating solutions on the basis of their boiling points </span>
