Question

do the following statements describe a chemical or physical change?
a flashlight beam slowly gets dimmer and finally goes out due to a dying battery.
frozen orange juice is reconstituted by adding water to it.

Explanation:

For the first situation, "Frozen orange juice is reconstituted by adding water to it", it is a physical change. Physical changes involve changes in the state or appearance of a substance without altering its chemical composition. Here, adding water to frozen orange juice is just a process of dissolving (a physical process).
For the second situation, "A flashlight beam slowly gets dimmer and finally goes out due to a dying battery", it is also a physical change. The battery's ability to produce electricity decreases over time, but there is no new chemical substance formed. It is a change in the electrical - chemical energy conversion efficiency (a physical phenomenon related to energy and electrical properties).

Answer:

Frozen orange juice reconstitution: Physical.
Flashlight beam dimming: Physical.